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Radius   /rˈeɪdiəs/   Listen
Radius

noun
(pl. L. radii; E. radiuses)
1.
The length of a line segment between the center and circumference of a circle or sphere.  Synonym: r.
2.
A straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere).
3.
A circular region whose area is indicated by the length of its radius.
4.
The outer and slightly shorter of the two bones of the human forearm.
5.
Support consisting of a radial member of a wheel joining the hub to the rim.  Synonyms: spoke, wheel spoke.



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"Radius" Quotes from Famous Books



... having been made for the protection of fur seals as a result of the decision of the Tribunal of Arbitration under the convention concluded as aforesaid February 29, 1892, which prohibits the killing of seals at any time within a radius of 60 miles around the Pribilof Islands or during May, June, and July of each year in that portion of the Pacific Ocean, inclusive of Bering Sea, situated to the north of the thirty-fifth degree of north latitude and ...
— Compilation of the Messages and Papers of the Presidents - Volume 8, Section 2 (of 2): Grover Cleveland • Grover Cleveland

... thus attained by considering abstract quantity is corroborated by considering concrete and discrete quantities. Such expressions as infinite sphere, radius, parallelogram, line, and so forth, are self-contradictory. A sphere is limited by its own periphery, and a radius by the centre and circumference of its circle. A parallelogram of infinite altitude is impossible, ...
— Christianity and Greek Philosophy • Benjamin Franklin Cocker

... Stanwick, which was in the North Riding, near Richmond. The Church was (as it still is) parochial as well as collegiate. Each prebend carried with it a cure of souls, yet all (except Stanwick) were included in the huge parish of Ripon, which extended to Pateley Bridge, and in 1300 had a radius of nine or ten miles. Thus the collegiate establishment differed from the usual type in which each prebend was a separate parish with a church of its own. Moreover, there was neither Dean nor Chancellor. The Canons may at first have lived in common, but as early ...
— Bell's Cathedrals: The Cathedral Church of Ripon - A Short History of the Church and a Description of Its Fabric • Cecil Walter Charles Hallett

... towards him, and my heart throbbed wildly as I saw the brute approach almost within clawing distance. The horse sprang round, however, and galloped upon a circle of which the lazo was the radius. I knew, from the hard jerks he had already given to the rope, that there was no chance of its yielding and freeing him. No; it was a raw-hide lazo of the toughest thong. I knew its power, and I remembered how ...
— The War Trail - The Hunt of the Wild Horse • Mayne Reid

... arm is extended by side of head, with the hand in position (J). The arm and hand then descend, the finger describing a semicircle with the arm as a radius. The sign stops with arm hanging at full length. (Oto I.) "The arm of authority ...
— Sign Language Among North American Indians Compared With That Among Other Peoples And Deaf-Mutes • Garrick Mallery


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