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Concave   /kɑnkˈeɪv/  /kˈɑnkeɪv/   Listen
Concave

adjective
1.
Curving inward.



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"Concave" Quotes from Famous Books



... consolidates. Flos aeris, in dry wounds, reduces but does not consolidate, but rather corrodes the tissues. Excessive suppuration is sometimes the result of too stimulating applications, sometimes of those which are too weak. In the former case the wound enlarges, assumes a concave form, is red, hot, hard and painful, and the pus is thin and watery (subtilis). If the application is too weak, the pus is thick and viscous, and the other signs mentioned are wanting. In either case the dressings are to be reversed. If any dyscrasia, such ...
— Gilbertus Anglicus - Medicine of the Thirteenth Century • Henry Ebenezer Handerson

... dreamily. 'I haf a rock-crystal lens which is permeable to this light, und which I can place in mine camera. I must have a concave mirror, not of glass, which is opaque to this ...
— The Grain Ship • Morgan Robertson

... his powerful mind, though it may have dimmed, could not obscure the brightness of his genius. To him, and apparently to him only, among all the inquiring spirits of the time, were known the properties of the concave and convex lens. He also invented the magic-lantern; that pretty plaything of modern days, which acquired for him a reputation that embittered his life. In a history of alchymy, the name of this great man cannot be omitted, ...
— Memoirs of Extraordinary Popular Delusions - Vol. I • Charles Mackay

... Lunardi [balloon], mounting through a stagnant calm in a line almost vertical, had pierced the morning mists, and now swam emancipated in a heaven of exquisite blue. Below us by some trick of eyesight, the country had grown concave, its horizon curving up like the rim of a shallow bowl—a bowl heaped, in point of fact, with sea fog, but to our eyes with a froth delicate and dazzling as a whipped syllabub of snow. Upon it the traveling ...
— Composition-Rhetoric • Stratton D. Brooks

... bakers against millers; and at length, in the month of April—troops of ragged Lackalls, and fierce cries of starvation! These are the thrice-famed Brigands: an actual existing quotity of persons: who, long reflected and reverberated through so many millions of heads, as in concave multiplying mirrors, become a whole Brigand World; and, like a kind of Supernatural Machinery wondrously move the Epos of the Revolution. The Brigands are here: the Brigands are there; the Brigands are coming! Not otherwise sounded the clang of Phoebus Apollos's silver bow, ...
— The French Revolution • Thomas Carlyle

... looking out of the window? See how the faithful sun-print advertises the rival establishment of "Meade Brothers, Ambrotypes and Photographs." What a fearfully suggestive picture! It is a leaf torn from the book of God's recording angel. What if the sky is one great concave mirror, which reflects the picture of all our doings, and photographs every act on which it looks upon dead and living surfaces, so that to celestial eyes the stones on which we tread are written with ...
— Atlantic Monthly, Volume 8, Issue 45, July, 1861 • Various

... fluttered like a silk flag, throwing an angry swaying glare mingled with moving shadows over the poop, lighting up the concave surfaces of the sails, gleaming on the wet paint of the white rails. And young Powell turned his eyes to windward with a catch in ...
— Chance • Joseph Conrad

... will sometimes practise now, when it has happen'd thro' rainy Weather, or some other Accident, that they have wet their Spunk, which is a sort of soft corky Substance, generally of a Cinnamon Colour, and grows in the concave part of an Oak, Hiccory, and several other Woods, being dug out with an Ax, and always kept by the Indians, instead of Tinder or Touch-wood, both which it exceeds. You are to understand, that the two Sticks they use to strike ...
— A New Voyage to Carolina • John Lawson

... limit of human discovery in these regions, one unbroken, or nearly unbroken, sheet of ice continues to extend. In the first few degrees of this its progress, its surface is very sensibly flattened, farther on depressed into a plane, and finally, becoming not a little concave, it terminates, at the Pole itself, in a circular centre, sharply defined, whose apparent diameter subtended at the balloon an angle of about sixty-five seconds, and whose dusky hue, varying in intensity, ...
— The Works of Edgar Allan Poe - Volume 1 (of 5) of the Raven Edition • Edgar Allan Poe

... portion a faint, unearthly glow clung close, the result of the terrific friction of the ascent. In miniature, in the regular screens, was Satellite III, but a distorted miniature, for its half-face appeared concave in shape, and dusted with the ...
— The Passing of Ku Sui • Anthony Gilmore

... 9.—Description of the laryngoscope and its mode of use.—The laryngoscope consists of a concave mirror which is fixed on the forehead with a band in such a way that the right eye looks through the hole in the middle. This mirror reflects the light from a lamp placed behind the right side of ...
— The Brain and the Voice in Speech and Song • F. W. Mott

... the ridge, I see the Grinstun man, Full short in stature and rotund is he, Pale grey his watery orbs, that dare not scan His interlocutor, and his goatee, With hair and whiskers like a furnace be: Concave the mouth from which his nose-tip flies In vain attempt to shun vulgarity. O haste, ye gods, to snatch from him the prize, And send him hence ...
— Two Knapsacks - A Novel of Canadian Summer Life • John Campbell

... of a head in shape. Cabochon cut stones usually have a flat base, but sometimes a slightly convex base is used, especially in opals and in moonstones, and some stones of very dense color are cut with a concave base to thin them and thus to reduce their color. The contour of the base may be round, or oval, or square, or cushion shape, or heart shape or of any regular form. The top is always smooth and rounding and unfacetted. The relation of the height or thickness to the length or width may be varied ...
— A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public • Frank Bertram Wade

... were all over the place, and much vigorous dancing was going on. Using the same gansa as the Ifugao, the Igorot beats it on the convex side with a regular padded drumstick, whereas the Ifugao uses any casual stick on the concave side. Moreover, the Bontok dancers went around their circle, beating their gansas the while, in a sort of lope, the step being vigorous, long, easy, and high; as in all the other dances seen, the motion ...
— The Head Hunters of Northern Luzon From Ifugao to Kalinga • Cornelis De Witt Willcox

... All are highly modified, and are strikingly different from the normal form seen in locomotive types of the group. The oyster may be taken as the type of the form adopted by attached pelecypods. The two valves are unequal, the attached valve being concave, the free valve flat; but they are not only unequal, they are often very dissimilar—as different as if they belonged to a distinct type in what would be considered typical forms. This is remarkable as a case of acquired and inherited characteristics finding very different ...
— Lamarck, the Founder of Evolution - His Life and Work • Alpheus Spring Packard

... the air is of as much importance as the shape of the fore-part in diminishing resistance. He does not seem to have known that it is of more importance. He knew that the resistance of the air acting on concave wings, or planes, at a small angle of incidence was resolved chiefly into lift, and he suspected that the amount of the lift was greater than the mathematical theory of his day allowed. Above all, his treatise is stimulating, and suggests ...
— The War in the Air; Vol. 1 - The Part played in the Great War by the Royal Air Force • Walter Raleigh

... individual earthenware and metal coffee-roasting plates appeared. These were circular, from four to six inches in diameter, about 1/16 inch thick, slightly concave and pierced with small holes, something like the modern kitchen skimmer. They were used in Turkey and Persia for roasting a few beans at a time over braziers (open pans, or basins, for holding live coals). The braziers were usually mounted on ...
— All About Coffee • William H. Ukers

... his purpose and was hurrying to fetch a heaping hatful of the dry clay. Before many minutes they had built a little concave dam, in which the down-seeping water slowly ...
— Bloom of Cactus • Robert Ames Bennet

... half cloud, melting indistinguishably into the vaporous haze of the sky. Above her, sheer and vast, lay Hemlock Mountain, all its huge bulk a sleeping, passionless calm. Beyond was the solemnity of Windward Mountain's concave shell, full to the brim with brooding blue shadows, a well of mystery in that day of wind-blown sunshine. Beneath her, above her, before her, seemingly the element in which she was poised, was space, illimitable space. She had never been conscious of such vastness, she was abashed by it, she ...
— The Bent Twig • Dorothy Canfield

... the form of a helicoidal or screw-shaped spiral, the rings of which, rising one over the other, occupy nearly the whole of the height of the tank. Before again issuing from it, this spiral runs into a small cone with a concave base, that is turned downward in the shape ...
— Five Weeks in a Balloon • Jules Verne

... through uncounted leagues before it reached my extremities; the air drawn into my lungs expanded into seas of limpid ether, and the arch of my skull was broader than the vault of heaven. Within the concave that held my brain, were the fathomless deeps of blue; clouds floated there, and the winds of heaven rolled them together, and there shone the orb of the sun. It was—though I thought not of that at the time—like a revelation of the mystery of omnipresence. It is difficult to ...
— The Lands of the Saracen - Pictures of Palestine, Asia Minor, Sicily, and Spain • Bayard Taylor

... we had descended. Both led in the direction of our route, and the pond we had just left was ascertained to be the only one in the little channel. I sought a good position for a depot camp on the newly-discovered river, and found one extremely favourable, on a curve concave to the N. W., overlooking, from a high bank, a dry ford, on a smooth rocky bed; and having also access to a reach of water, where the bottom was hard and firm. We approached this position with our carts, in the midst of smoke and flame; the natives having availed themselves of ...
— Journal of an Expedition into the Interior of Tropical Australia • Thomas Mitchell

... operative crawled up and glanced over the crest. In a hollow before them was a crude one-storied house, and erected on an open space before it was a massive piece of apparatus. It consisted of a number of huge metallic cylinders, from which lines ran to a silvery concave mirror mounted on an elaborate frame which would allow it to be rotated so as ...
— Astounding Stories of Super-Science, March 1930 • Various

... aspect of them he sees and has to experience. God's way has a bright side and a dark. You may take which you like. You can lay hold of the thing by whichever handle you choose. On the one side it is convex, on the other concave. You can approach it from either side, as you please. 'The way of the Lord' must touch your 'way.' Your cannot alter that necessity. Your path must either run parallel in the same direction with His, and then ...
— Expositions Of Holy Scripture - Volume I: St. Luke, Chaps. I to XII • Alexander Maclaren

... speed of twenty-eight knots and have a cruising radius exceeding 1200 miles. The design of the hull is the concave bottom, square bilge type, developed for this particular service. It furnishes a steady gun platform, which, with the necessary speed, is the most vital ...
— Kelly Miller's History of the World War for Human Rights • Kelly Miller

... diverging red cross lines; centre flat, nearly at right angles with the upper edge, white, with a convex thread-like rib round its base, which is distantly articulated; base of the whorls convex, red, punctured and variegated with white; axis conical, concave, white, smooth at the commencement; aperture subquadrangular; inside pearly, inner lip with an obscure tooth at the end of the umbilicus; axis one-fourth, ...
— Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2] • Phillip Parker King

... embankment behind which now rested the Light Division and Taliaferro and Early. The wind here was loud, rattling a thicker growth of reeds. Above, the long, silent, flickering lights mocked with their rosy hue, and the glittering stars mocked, and the empty concave of the night mocked, and the sound of the Rappahannock mocked. A river moving by like the River of Death, and they could not even get to the river to drink, ...
— The Long Roll • Mary Johnston

... stampeding mules with the men in pursuit. Then crashing through the bushes he saw why the fire still burned—Susan was holding an umbrella over it, the rain spitting in the hot ash, a pan of biscuits balanced in the middle. Behind her the tent, one side concave, the other bellying out from restraining pegs, leaped and jerked at its moorings. A rumble of thunder rolled across the sky and the rain came at them in ...
— The Emigrant Trail • Geraldine Bonner

... three weeks. The trick put upon him may be shortly described by the fact that the female choristers were placed in an adjoining room, and that he only fired at their reflection thrown forward into that in which he slept by the effect of a concave mirror. ...
— Letters On Demonology And Witchcraft • Sir Walter Scott

... away to the east the low, concave sweep of the prairie was cut by the jagged banks and curves of a watercourse which drained the melting snows in earlier spring. Along the further bank a dozen buffalo were placidly grazing, unconscious ...
— Warrior Gap - A Story of the Sioux Outbreak of '68. • Charles King

... what has been called by French military critics "The Race to the Sea." In this race to the sea the Germans had a great advantage over the French. A glance at the map is enough to make it understood. The concave form of the German front made the lines of transportation shorter; they were within the interior of the angle, while the French were at the exterior. On the German side this movement drew into the line more than eighteen army corps, ...
— The Story of the Great War, Volume III (of 12) - The War Begins, Invasion of Belgium, Battle of the Marne • Francis J. Reynolds, Allen L. Churchill, and Francis Trevelyan

... because the character determines the motive and therefore the action. Nobody should have seen this more clearly than Mill as a good 'determinist.' Conduct and character are related as the convex and concave of the curve; conduct is simply the manifestation of character, and to ...
— The English Utilitarians, Volume II (of 3) - James Mill • Leslie Stephen

... deliciously through shallows of white cloud. Beyond the trees and the few houses was the great concave of darkness, the sea, and the moonlight. The moon was there to put a cool hand of absolution on ...
— The Trespasser • D.H. Lawrence

... most elaborately of a single flattened band of chips, which is rolled up into a coil four layers deep. One side, forming the bottom of the cell, is concave, being beaten down and smoothed off by the bee. The other side of the partition, forming the top of the cell, ...
— Our Common Insects - A Popular Account of the Insects of Our Fields, Forests, - Gardens and Houses • Alpheus Spring Packard

... entirely precludes a rotation of the wings. The whole structure and form of the wings of insects, moreover, indicate an action in flight quite analogous to that of birds. I believe that a careful examination will show that the wings of almost all insects are slightly concave beneath. Further, they are all constructed with a strong and rigid anterior margin, while the outer and hinder margins are exceedingly thin and flexible. Yet further, I feel confident (and a friend here ...
— Alfred Russel Wallace: Letters and Reminiscences Vol 2 (of 2) • James Marchant

... rocks of adamant the walls ascend, Tall columns heave, and sky-like arches bend; Bright o'er the golden roof the glittering spires Far in the concave meet the solar fires; Four blazing fronts, with gates unfolding high, Look with immortal splendor ...
— The Atlantic Monthly, Volume 15, No. 88, February, 1865 • Various

... the heavens produce: and round the gold Two brazen rings of work divine were roll'd. The bossy naves of sold silver shone; Braces of gold suspend the moving throne: The car, behind, an arching figure bore; The bending concave form'd an arch before. Silver the beam, the extended yoke was gold, And golden reins the immortal coursers hold. Herself, impatient, to the ready car, The coursers joins, and breathes revenge ...
— The Iliad of Homer • Homer

... dramatis personae who perform the vocal parts, the first is a fellow, in a tone that would rend hell's concave, bawling, "Dust, ho! dust, ho! dust!" Next to him, an amphibious animal, who nightly pillows his head on the sedgy bosom of old Thames, in a voice that emulates the rush of many waters, or the roaring of ...
— The Works of William Hogarth: In a Series of Engravings - With Descriptions, and a Comment on Their Moral Tendency • John Trusler

... above the place where the sphere had been and in its jaws it held the bar. But the end of the bar, the eight inches that had been within the sphere, was gone. It had been sliced off so sharply that it left a highly reflective concave mirror on the ...
— Empire • Clifford Donald Simak

... nooks for pigeons in an adjoining cave. In many cases there are cisterns; in one is a well. The cisterns had to be filled laboriously. They are provided with bungholes for the purpose of occasional cleaning out. The walls are scored with concave grooves slanting downwards, uniting and leading into small basins. The moisture condensing on the sides trickled into these runnels and supplied the basins with drinking water. The mangers have holes bored in the stone through which passed ...
— Castles and Cave Dwellings of Europe • Sabine Baring-Gould

... wide-spreading and concave hoofs the Woodland caribou does not have to "yard" as other deer do in winter time, for thus provided with natural snowshoes, the caribou can pass over the deepest snow with little trouble. Also, throughout the year it is an extensive traveller, and as its food ...
— The Drama of the Forests - Romance and Adventure • Arthur Heming

... is not crushed and suddenly destroyed, as is sometimes supposed," for he had often liberated "captive flies and spiders, which sped away as fast as fear or joy could hasten them." But he neglected to state, although he must have noticed the fact, that the two sides of the trap, at first concave to the contained insect, at length flatten and close down firmly upon the prey, exerting no inconsiderable pressure, and insuring the death of any soft-bodied insect, if it had not already succumbed to the confinement and salivation. This last Dr. Curtis noticed, and first ...
— Darwiniana - Essays and Reviews Pertaining to Darwinism • Asa Gray

... employed upon the rock had been of the simplest and coarsest description, it had in this chapel employed the invention and the chisels of the most able architects. The groined roofs rose from six columns on each side, carved with the rarest skill; and the manner in which the crossings of the concave arches were bound together, as it were, with appropriate ornaments, were all in the finest tone of the architecture of the age. Corresponding to the line of pillars, there were on each side six richly-wrought niches, each of which contained the ...
— The Talisman • Sir Walter Scott

... is concave or convex according to the side from which you look at it. From one it swells out into rounded fullness; from the other it gapes as in empty hungriness. So the rich fool of the preceding parable ...
— Expositions Of Holy Scripture - Volume I: St. Luke, Chaps. I to XII • Alexander Maclaren

... are the municipal police," explained the king, resting his hand on the gold frame of the glass; "they are watching the city." And when the strangers drew nearer they were surprised to see reflected, in the deeply concave glass, the entire city in miniature; its streets, parks, public buildings, and moving populace. And what seemed to be the most remarkable feature of the invention was, that the instant the eye rested on any particular portion of the whole that part was at once magnified so that every detail ...
— The Land of the Changing Sun • William N. Harben

... to cross wide snow-covered districts, but frequently to pass across frozen expanses of water. To enable them to do this in the winter, the frog of the foot is almost entirely absorbed, and the edges of the hoof, now quite concave, grow out in sharp ridges, each division on the under surface presenting the appearance of a huge mussel-shell, and serving the office of natural skates. So rapidly does the shell increase, that the frog does not fill up again till spring, when the antlers ...
— The Western World - Picturesque Sketches of Nature and Natural History in North - and South America • W.H.G. Kingston

... collar. It was a flash of common-sense genius—beautiful through its very simplicity. The result was Maudslay's self-tightening collar, the action of which a few words of description will render easily intelligible. A collar of sound leather, the convex side upwards and the concave downwards, was fitted into the recess turned out in the neck of the press-cylinder, at the place formerly used as a stuffing-box. Immediately on the high pressure water being turned on, it forced its way into the leathern concavity and 'flapped out' the bent edges of the ...
— Industrial Biography - Iron Workers and Tool Makers • Samuel Smiles

... the end of the small branches; each berry supported by a seperate stem, and as many as from 3 to 18 or 20 in a clump. the berry is ovate with one of it's extremities attatched to the peduncle, where it is in a small degre concave like the insertion of the stem of the crab apple. I know not whether this fruit can properly be denominated a berry, it is a pulpy pericarp, the outer coat of which is in a thin smoth, tho firm tough pillecle; the pericarp ...
— The Journals of Lewis and Clark • Meriwether Lewis et al

... fatal horse, But fate retards the blow, and stopt its force: The spear jumpt back upon the priest, so nigh, It gave new credit to the treachery. Yet to confirm how weak was the attempt 'Gainst what the gods will have, his javelin sent, Resum'd with double fury, thro' his side, And the large concave of the machine try'd: When from within the captive Grecians roar; And the beast trembles with another's fear. Yet to the town the present they convey, Thus a new stragem does Troy betray; While to the taken, she becomes a prey. But other monsters there enform our eyes, What ...
— The Satyricon • Petronius Arbiter

... longer in the hall. He was marching along a gallery overhanging one of the great streets of the moving platforms that traversed the city. Before him and behind him tramped his guards. The whole concave of the moving ways below was a congested mass of people marching, tramping to the left, shouting, waving hands and arms, pouring along a huge vista, shouting as they came into view, shouting as they passed, shouting as they receded, until the globes of electric ...
— When the Sleeper Wakes • Herbert George Wells

... thus chanted to her comity, the chorus straightway shrills with trembling tongues, the light tambour booms, the concave cymbals clang, and the troop swiftly hastes with rapid feet to verdurous Ida. Then raging wildly, breathless, wandering, with brain distraught, hurrieth Attis with her tambour, their leader through ...
— The Carmina of Caius Valerius Catullus • Caius Valerius Catullus

... Andy disclosed a mysterious device resembling two hard rubber shoe horns, joined in the centre by a concave piece ...
— Andy the Acrobat • Peter T. Harkness

... like the mystery of this problem might not be in reality its clue, I became aware of another listener. Its lean and dismal length was disproportionate to that small ship. It had on but dungarees and a singlet, and the singlet, because of the length of the figure, was concave at the stomach, where, having nothing to rest upon, it was corrugated through the weight of a head made brooding by a heavy black beard. Hairy wrists were thrust deeply into the pockets to hold up the trousers. The dome of its head was as bald and ...
— London River • H. M. Tomlinson

... same object appears straight when looked at out of the water, and crooked when in the water; and the concave becomes convex, owing to the illusion about colours to which the sight is liable. Thus every sort of confusion is revealed within us; and this is that weakness of the human mind on which the art of conjuring and of deceiving by light and ...
— The Republic • Plato

... softness in the prismatic lymph that give a new form and color to the common and familiar objects it has printed in its still, pellucid depths. Every little basin of clear water by the roadside is a magic mirror, and transforms all that it encloses. There is a vastness of depth, too, in that concave hemisphere, through which the vision sinks like a falling star, that excites and fills the imagination. What it shows is only a shadow, but all things seen are mere shadows painted on the retina, and you have, at such times, a realistic sense of the beautiful and bold imagery which calls a favorite ...
— Lippincott's Magazine Of Popular Literature And Science, No. 23, February, 1873, Vol. XI. • Various

... turning and twisting it as he ripped off the thick and fibrous husk. Then he cracked each nut in half with a well-directed blow of a heavy knife. For the best copra-making, the half-nuts should be placed in the sun, concave side up. As the meats begin to dry, they shrink away from the shell and are readily removed, being then copra, the foundation of the many toilet preparations, soaps and creams, that are ...
— White Shadows in the South Seas • Frederick O'Brien

... bear the smell of it, although at the same time nothing else was to be had, and I was suffering actual hunger. The native women cook it in various ways. The entrails are chopped up and made into a delicious soup called sarapatel, which is generally boiled in the concave upper shell of the animal used as a kettle. The tender flesh of the breast is partially minced with farinha, and the breast shell then roasted over the fire, making a very pleasant dish. Steaks cut from the breast and cooked with the fat ...
— The Naturalist on the River Amazons • Henry Walter Bates

... Lord has scattered Bountifully on the sky, Some soul thought they there were spattered For an ornamental dye; The huge Opalescent Concave Wore the polish of a stone Which the fracturing fires engrave With a thunder-splitting tone; And the things they claimed as sponsors For the young religious thought Were the things that were the monsters ...
— A Williams Anthology - A Collection of the Verse and Prose of Williams College, 1798-1910 • Compiled by Edwin Partridge Lehman and Julian Park

... sight," or hyperopia), we put a plus or bulging glass before the eye and thus correct its shape. But if the eye is too round and bulging, producing the familiar "short sight," or myopia, we put a minus or concave lens before the eye, and thus bring it back to the normal. By a curious paradox, however, it often happens that the headache due to eye-strain is caused not by the grosser defects, such as interfere ...
— Preventable Diseases • Woods Hutchinson

... Sieb. (MASSON'S PINE.) Leaves in twos, 4 to 6 in. long, rather stiff, concave on one side and convex on the other, twisted but not curved; sharp-pointed, of a fresh, bright green color. Cones 1 to 11/2 in. long, conical, incurved, solitary but numerous, with closely overlapping scales terminating in slender ...
— Trees of the Northern United States - Their Study, Description and Determination • Austin C. Apgar

... me an account of his travels, spent four or five days visiting among the Natchez, and then returned to take leave of me, when I made him a present of several wares of no great value, among which was a concave mirror about two inches and a half diameter, which had cost me about three halfpence. As this magnified the face to four or five times its natural size, he was wonderfully delighted with it, and would not have exchanged it with the best ...
— History of Louisisana • Le Page Du Pratz

... A sleek, swarthy world-old young man with the fashionable concave torso, and alarmingly convex bone-rimmed glasses. Through them his darkly luminous gaze glowed upon Terry. To escape their warmth she sent her own gaze past him to encounter the arctic stare of the large blonde person who had been included so lamely in the introduction. ...
— Cheerful—By Request • Edna Ferber

... which the universal host up sent A shout, that tore Hell's concave, and beyond Frighted the reign of ...
— The Grammar of English Grammars • Goold Brown

... territory recovered from the Bosche by bomb and bayonet. (The captured trench lies behind us now, and serves as our second line.) They are muddy—you come to water at three feet—and at one end, owing to their concave formation, are open to enfilade. The parapet in many places is too low. If you make it higher with sandbags you offer the enemy a comfortable target: if you deepen the trench you turn it into a running stream. Therefore ...
— The First Hundred Thousand • Ian Hay

... act together, producing compound stresses, as in flexure. When a bow is bent there is a compression of the fibres on the inner or concave side and an elongation of the fibres on the outer or convex side. There is also a tendency of the various fibres to slide past one another in a longitudinal direction. If the bow were made of two or more separate pieces of equal ...
— The Mechanical Properties of Wood • Samuel J. Record

... woods, or beauteous human shape. It is always within. It requires no waking; no renewal; it is always with me. I am it; the fact of my existence expresses it.After a long interval I came to the hills again, this time by the coast. I found a deep hollow on the side of a great hill, a green concave opening to the sea, where I could rest and think in perfect quiet. Behind me were furze bushes dried by the heat; immediately in front dropped the steep descent of the bowl-like hollow which received and brought up to me the faint sound of the summer waves. Yonder ...
— The Story of My Heart • Richard Jefferies

... of hardly concave paten, now no longer receives aught from the spinnerets in its centre; the marginal belt alone increases in thickness. The piece thus becomes a bowl-shaped porringer, surrounded by a wide, ...
— The Life of the Spider • J. Henri Fabre

... succeeded were connected with each of these three points. To solar light, an artificial one has been preferred. D'Acquapendentus' bottle has given way to the convex lens, and to concave, spherical, and parabolic mirrors, etc. De Hilden's speculum has been replaced by cylindrical, conical, bivalve, and other forms ...
— Scientific American Supplement, No. 488, May 9, 1885 • Various

... fattest of the three), that stood frying and fretting, half-blessing, half-cursing "the gentleman," and imprint upon her chaste lips a tender salute, whereat the universal host would set up a shout that tore the concave, while hundreds of grinning teeth startled the night with their brightness. O it was a pleasure to see the sable younkers lick in the unctuous meat, with his more unctuous sayings—how he would fit the tit bits to the puny ...
— The Works of Charles and Mary Lamb, Volume 2 • Charles Lamb

... A large disk of white quartz, measuring five inches in diameter and an inch and three fourths in thickness. The margin is rounded, and both surfaces are deeply concave though imperforate. ...
— Some Observations on the Ethnography and Archaeology of the American Aborigines • Samuel George Morton

... of a branch of the incense cedar (Libocedrus decurrens), or of the California nutmeg (Tumion Californicum [Torreya]), made flat on the outer side, and rounded smooth on the inner or concave side when the bow is strung for use. The flat, outer side was covered with sinew, usually that from the leg of a deer, steeped in hot water until it became soft and glutinous, and then laid evenly and smoothly over the wood, and so shaped at the ...
— Indians of the Yosemite Valley and Vicinity - Their History, Customs and Traditions • Galen Clark

... concave of the luminous air, Large, loving, and languid, the stars here and there, Like the eyes of shy passionate women, look'd down O'er the dim world whose sole tender light was their own, When Matilda, alone, from her chamber descended, And enter'd the garden, unseen, unattended. ...
— Lucile • Owen Meredith

... carving. This carving consists simply of a series of lines or cuts, following some regular design into which dirt is rubbed to make it black. The combs may be further decorated with bright-colored bird feathers fastened with beeswax or gum to the concave side of the end which has no teeth. The feathers may be notched saw-tooth fashion and have string tassels fastened to the ends. In lieu of feathers horsehair and a kind of moss or other plant fiber are often used. The most elaborate decorations were noticed only ...
— Negritos of Zambales • William Allan Reed

... lenticular, beneath plane or concave, variously colored, yellow, greenish yellow, rusty orange, stipitate, nodding; the peridium splitting irregularly or reticulately; stipe variable in length and color, through various shades of red and yellow, subulate; capillitium strongly developed, concolorous with sporangium, the tubes ...
— The North American Slime-Moulds • Thomas H. (Thomas Huston) MacBride

... result, perceived form not as an appearance, but as a reality; saw with the eye the complexities of projection and depression perceivable by the hand. His craft was that of measurements, of minute proportion, of delicate concave and convex—in one word, of planes. His dull, malleable clay, and ductile, shining bronze had taught him nothing of the way in which light and shadow corrode, blur, and pattern a surface. His fancy, his skill, embraced ...
— Renaissance Fancies and Studies - Being a Sequel to Euphorion • Violet Paget (AKA Vernon Lee)

... sooty chimney swallows that rumbled nightly in the great brick flues of the farmhouse, and at first almost terrified me, but at length furnished the thalamian refrain that most surely lulled me asleep; the red-headed woodpeckers that with sharp cries and concave stoop of flight moved fitfully, from tree to tree, tapping this one loudly, that one low and dull, and whose nest hole in the dead maple on the hillside was re-occupied year after year, till at ...
— When Life Was Young - At the Old Farm in Maine • C. A. Stephens

... his astonished countenance. His big chest heaved. Like many another wounded giant before him, he experienced the insufficiency of interjections to solace pain. For them, however, the rocks were handy to fling, the trees to uproot; heaven's concave resounded companionably to their bellowings. Relief of so concrete a kind is not to be obtained in ...
— The Shaving of Shagpat • George Meredith

... twenty-four flutes, channelled out in such a way that if a carpenter's square be placed in the hollow of a flute and turned, the arm will touch the corners of the fillets on the right and left, and the tip of the square may keep touching some point in the concave surface as it moves through it. The breadth of the flutes is to be equivalent to the enlargement in the middle of a column, which will be found in ...
— Ten Books on Architecture • Vitruvius

... for each individual) furnishes a considerable revenue to the king in the course of a year. The canoes are of a singular construction, each of them being formed of the trunks of two large trees, rendered concave, and joined together, not side by side, but end-ways, the junction being exactly across the middle of the canoe; they are, therefore, very long and disproportionately narrow, and have neither decks nor masts. They are however, very roomy, for I observed in one of them four horses and several people ...
— Life and Travels of Mungo Park in Central Africa • Mungo Park

... that the two lobes act as opposable fingers, and serve to grasp any object which the animal desires to hold. This structure can easily be seen by offering the animal a piece of biscuit. The forehead, too, affords another means of distinction, being convex in the African, and flat or slightly concave in ...
— Happy Days for Boys and Girls • Various

... allusions military and funereal. A great eagle of course tops the whole: tripods burning spirits of wine stand round this kind of dead man's throne, and as we saw it (by peering over the heads of our neighbors in the front rank), it looked, in the midst of the black concave, and under the effect of half a thousand flashing cross-lights, properly grand and tall. The effect of the whole chapel, however (to speak the jargon of the painting-room), was spoiled by being CUT UP: there were too many objects for the eye to rest upon: the ten thousand ...
— The Second Funeral of Napoleon • William Makepeace Thackeray (AKA "Michael Angelo Titmarch")

... an electric bulb, dimly illuminating a cubicle barely big enough to accommodate the bunk, a dresser, and a small desk with a folding seat. The inner wall was a slightly concave surface of steel plates whose seams oozed moisture. In the opposite wall was a sliding door, open, beyond which ran a narrow alleyway floored with metal grating. Everything in sight was enamelled with white paint and clammy with the sweat of that ...
— The False Faces • Vance, Louis Joseph

... with concave leaves shaped like a cup was locally called Ariticun or Articun. It produced a large ...
— Across Unknown South America • Arnold Henry Savage Landor

... heat as tin, and more than six times as good a conductor of electricity. Where tin fillings are subject to a large amount of attrition, they wear away sooner or later, but this is not such a great detriment, for they can easily be repaired or replaced, and owing to the concave form produced by wear the patient is liable to know when a large amount has been worn away. That portion against the wall of the cavity is the last removed by wear, so that further caries is prevented so long as there is any reasonable amount of tin left. If at this time the tooth has become ...
— Tin Foil and Its Combinations for Filling Teeth • Henry L. Ambler

... air, which was followed by a ring or hoop of fire, and within this hoop stood a man and woman of small size, handsomely dressed. With one arm they embraced each other, and with the other they took hold of the hoop, and their feet rested on the concave surface of the ring. When the hoop reached the earth these two beings jumped out of it, and immediately proceeded to make a circle on the ground. As soon as this was done, a large number of men and ...
— Welsh Folk-Lore - a Collection of the Folk-Tales and Legends of North Wales • Elias Owen

... the covered bridge which crossed the brook, paused and looked through a space between the side timbers. This brook was a sturdy little torrent at all times; in spring it was a river. Now, under the white concave of wintry moonlight, it broke over its stony bed with a fierce persistency of advance. Jerome looked down at the rapid, shifting water-hillocks and listened to their lapsing murmur, incessantly overborne by the gathering rush of onset, then nodded his head conclusively, as if in response ...
— Jerome, A Poor Man - A Novel • Mary E. Wilkins Freeman

... thick, nearly met above the short, tip-tilted nose, freckled as a plover's egg, and that at a time when no well brought-up damsel ventured forth in the sun's rays without veil or parasol. Her face was deficient in modelling, being one of those subtly concave faces not without a fascination of their own, with an egg-like curve of prominent delicately-square chin. Her mouth, too large, opened very beautifully when she laughed over square thickly-white teeth. Her eyes were ...
— Secret Bread • F. Tennyson Jesse

... on any point of the earth and look up, the heavenly bodies appear as though they were situated upon the surface of a vast hollow sphere, of which your eye is the center. Of course this apparent concave vault has no existence and we cannot accurately measure the distance of the heavenly bodies from us or from each other. We can, however, measure the direction of some of these bodies and that information is of tremendous value to us in helping us ...
— Lectures in Navigation • Ernest Gallaudet Draper

... and thorax of the imago are freed from it (fig. 8 a), then the legs clasp the empty cuticle, and the abdomen is drawn out (fig. 8 b, c). After a short rest, the newly-emerged fly climbs yet higher up the water-weed, and remains for some hours with the abdomen bent concave dorsalwards (fig. 8 d), to allow space for the expansion and hardening of the wings. For some days after emergence the cuticle of the dragon-fly has a dull pale hue, as compared with the dark or brightly metallic aspect ...
— The Life-Story of Insects • Geo. H. Carpenter

... that the convex outside curve of wings allowed the wind to escape over them, while the under side, being concave, held every breath. Thus the upward stroke did not simply counterbalance the downward and keep him stationary. Moreover, she showed him how the feathers underlapped each other so that the downward stroke pressed them closely together to ...
— Jimbo - A Fantasy • Algernon Blackwood

... she was not clear concerning the processes of birth. But in her mind's eye she saw Marion lying on a narrow bed, her body clenched under the blankets; and her face pale and concave at cheek and temple with sickness and persecuted resolution, holding at bay with her will a crowd of doctors pressing round her with scalpels in their hands, preserving by her tensity the miracle of life that was to be Richard. If she had ...
— The Judge • Rebecca West

... cases the concave mirror, either of polished copper or black japan, will be found serviceable. In certain cases where the faculty is already developed but lying in latency, any shining surface will suffice to bring it into activity. Ecstatic vision was first induced in Jacob Boehme by the ...
— Second Sight - A study of Natural and Induced Clairvoyance • Sepharial

... result. They set men at work to devise another kind of telescope. In the new form, called the Reflecting Telescope, or "Reflector," the light coming from the object under observation was reflected into the eye-piece from the surface of a highly polished concave metallic mirror, or speculum, as it was called. It is to Sir Isaac Newton that the world is indebted for the reflecting telescope in its best form. That philosopher had set himself to investigate the causes of the rainbow-like, or prismatic colours which for a long time ...
— Astronomy of To-day - A Popular Introduction in Non-Technical Language • Cecil G. Dolmage

... more divisions; 4 stamens inserted on tube of corolla; 2 stigmas; calyx 4-lobed. Leaves: Opposite, seated on stem, oblong, tiny; the lower ones spatulate. Fruit: A 2-lobed pod, broader than long, its upper half free from calyx; seeds deeply concave. Root stock: Slender, spreading, forming dense tufts. Preferred Habitat - Moist meadows, wet rocks and banks. Flowering Season - April-July, or sparsely through summer. Distribution - Eastern Canada and United States west to Michigan, south to ...
— Wild Flowers, An Aid to Knowledge of Our Wild Flowers and - Their Insect Visitors - - Title: Nature's Garden • Neltje Blanchan

... roughly speaking the limbs are symmetrical, each side not only has variety in itself, but there is usually variety of opposition. Supposing there is a convex curve on the one side, you will often have a concave form on the other. Always look out for this in drawing limbs, and it will often improve a poorly drawn part if more of this variation on symmetry ...
— The Practice and Science Of Drawing • Harold Speed

... find a slight pinch between the thumb and finger at the end of the tendril of the Cucurbitaceae causes prompt movement, but a pinch excites no movement in Cissus. The cause is that one side alone (the concave) is irritable in the former; whereas both sides are irritable in Cissus, so if you excite at the same time both OPPOSITE sides there is no movement, but by touching with a pencil the two branches of the tendril, in any part whatever, ...
— The Life and Letters of Charles Darwin, Volume II • Francis Darwin

... sir, the stars shine without winking up here. What else?... Space is inky black—no deep purples or queer more-than-blacks like some jetted-up writers dreamed up—just plain old ordinary dead black. Earth, sir?... Well, it does look dish-shaped from up here, concave.... Sure, I can see all the way to Europe and—say! Here's something unexpected. I can see that hurricane off the coast of Florida.... You said it, sir! Once we install permanent space stations up here it will ...
— Shipwreck in the Sky • Eando Binder

... to five logs piled eight feet high and filled with earth and rock, was pierced with a double row of port-holes: one row for the kneeling warriors, and one for the standing warriors. The barricade was built in zigzags, along a concave curve, so that attackers would be cut down by shots from two sides as well as from in front. By reason of the zig-zags it could not be ...
— Boys' Book of Indian Warriors - and Heroic Indian Women • Edwin L. Sabin

... broken ends, burns for weeks or even months without being much influenced by the weather. After the great glowing ends fronting each other have burned so far apart that their rims cease to burn, the fire continues to work on in the centres, and the ends become deeply concave. Then heat being radiated from side to side, the burning goes on in each section of the trunk independent of the other, until the diameter of the bore is so great that the heat radiated across from side to side is not sufficient ...
— Modern Prose And Poetry; For Secondary Schools - Edited With Notes, Study Helps, And Reading Lists • Various

... Its light, rendered bluish by the thick strata of the atmosphere was less intense than that of the crescent moon, but it was of considerable dimensions, and looked like an enormous arch stretched across the firmament. Some parts brilliantly lighted, especially on its concave part, showed the presence of high mountains, often disappearing behind thick spots, which are never seen on the lunar disc. They were rings of clouds placed concentrically round ...
— Jules Verne's Classic Books • Jules Verne



Words linked to "Concave" :   cupular, dished, recessed, pouchlike, concavity, dish-shaped, pouch-shaped, cotyloidal, bowl-shaped, concavo-concave, urn-shaped, convex, intrusive, cotyloid, patelliform, cupulate, saclike, bursiform, umbilicate, saucer-shaped, concavo-convex, acetabular, boat-shaped, cuplike



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