Online dictionaryOnline dictionary
Synonyms, antonyms, pronunciation

  Home
English Dictionary      examples: 'day', 'get rid of', 'New York Bay'




Achromatic   Listen
adjective
Achromatic  adj.  
1.
(Opt.) Free from color; transmitting light without decomposing it into its primary colors.
2.
(Biol.) Uncolored; not absorbing color from a fluid; said of tissue.
Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.
Achromatic prism. See Prism.
Achromatic telescope, or Achromatic microscope, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color.






Collaborative International Dictionary of English 0.48








Advanced search
     Find words:
Starting with
Ending with
Containing
Matching a pattern  

Synonyms
Antonyms
Quotes
Words linked to  

only single words



Share |
Add this dictionary
to your browser search bar





"Achromatic" Quotes from Famous Books



... 237 W. Decatur St., Decatur, Ill., an electric motor, a 1-cell bichromate battery, a pair of skates, an achromatic lens and 2 fonts of type for ...
— Golden Days for Boys and Girls, Vol. XIII, Nov. 28, 1891 • Various

... at the other, and fashioning flank and limb into due salamandrine proportions, in so artistic a way, that, after watching the process hour by hour, one is almost involuntarily possessed by the notion, that some more subtle aid to vision than an achromatic, would show the hidden artist, with his plan before him, striving with skilful ...
— Darwiniana • Thomas Henry Huxley

... first telescope. Possibly, in time, say a few geological ages, it might in some optician's shop have brought about a combination of flint and crown glass which, together, should have been achromatic. But the space between the humors of the eye is not an optician' s shop where object-glasses of all kinds, shapes, and sizes, are placed by chance, in all manner of relations and positions. On the hypothesis under which our skeptic is making his examination—the eye having been completed ...
— Darwiniana - Essays and Reviews Pertaining to Darwinism • Asa Gray

... Orion." In taking photographs from these mirrors, a movement of the sensitive plate of only one-hundredth of an inch will render the image perceptibly less sharp. It was this accuracy of convergence of the light which led Dr. Draper to prefer the mirror to the achromatic lens. He has taken almost all the daily phases of the moon, from the sixth to the twenty-seventh day, using mostly some of Mr. Anthony's quick collodion, and has repeatedly obtained the full moon by means of it in one-third ...
— Atlantic Monthly, Vol. XII. July, 1863, No. LXIX. - A Magazine Of Literature, Art, And Politics • Various

... of course. She never loses her head,—I don't believe she would in an earthquake. Whenever we were at work with our microscopes at the Institute I always told her that her mind was the only achromatic one I ever looked into,—I did n't say looked through.—-But I did n't come to talk about that. I read in one of your books that when Sydenham was asked by a student what books he should read, the great physician said, 'Read "Don Quixote."' I want you to explain that to me; and then I want ...
— A Mortal Antipathy • Oliver Wendell Holmes, Sr.



Words linked to "Achromatic" :   dark-grey, blackish-gray, yellow-gray, ebony, milk-white, ebon, yellow-grey, reddish-gray, ashy, inky, yellowish-grey, violet-black, reddish-grey, charcoal-grey, slate-gray, hueless, gray, canescent, greyish-black, charcoal, bluish-white, red-gray, dull-white, white-flowered, snow-white, grey-white, slaty, blue-white, greyish-white, grayish-white, silver-white, olive-gray, yellow-white, stone-grey, brown-black, brown-gray, ash-grey, brownish-grey, pinkish-white, snowy, off-white, slate-grey, olive-grey, blue-gray, yellowish-gray, brownish-black, slate-black, blackish, cottony-white, iron-grey, jet-black, grey-black, greyish, black-gray, purplish-black, oxford-gray, chalky, ink-black, brown-grey, achromatic colour, cool-white, green-white, achromatic color



Copyright © 2024 Dictionary One.com