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Radius   /rˈeɪdiəs/   Listen
noun
Radius  n.  (pl. L. radii; E. radiuses)  
1.
(Geom.) A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.
2.
(Anat.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. Note: The radius is on the same side of the limb as the thumb, or pollex, and in man it is so articulated that its lower end is capable of partial rotation about the ulna.
3.
(Bot.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2.
4.
pl. (Zool.)
(a)
The barbs of a perfect feather.
(b)
Radiating organs, or color-markings, of the radiates.
5.
The movable limb of a sextant or other angular instrument.
Radius bar (Mach.), a bar pivoted at one end, about which it swings, and having its other end attached to a piece which it causes to move in a circular arc.
Radius of curvature. See under Curvature.






Collaborative International Dictionary of English 0.48








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"Radius" Quotes from Famous Books



... of Calder, who about that time was Inspector of Schools for the Territories, not yet provinces. The silent young inspector must have looked like the reincarnation of Socrates as he drove—sometimes a four-horse team on a buckboard—through the sloughs of the Northwest. No prairie doctor with a radius of fifty miles, none but a pioneer missionary like McDougall or Robertson, ever had so glorious a chance to study what the life of a new country was going to be, as this inspector toiling hundreds of miles over a land, where, if he ...
— The Masques of Ottawa • Domino

... had an abundance of hope and great faith in God. These have always been my greatest assets in this work. The people in the community were equally poor; not more than ten acres of land were owned by the colored people within a radius of ten miles, and there was even a mortgage on these ten acres. The homes of the people consisted chiefly of one-room and two-room log cabins. There was not a single glass window to be found. I remember that shortly after ...
— Twenty-Five Years in the Black Belt • William James Edwards

... do delight in travelling from place to place), my railway-labels. Had nomady been my business, had I been a commercial traveller or a King's Messenger, such labels would have held for me no charming significance. But I am only by instinct a nomad. I have a tether, known as the four-mile radius. To slip it is for me always an event, an excitement. To come to a new place, to awaken in a strange bed, to be among strangers! To have dispelled, as by sudden magic, the old environment! It is on the scoring of such points as these that I preen myself, and my memory is always ringing ...
— Yet Again • Max Beerbohm

... along this line, with the moor, as you perceive, upon the right of it. This small clump of buildings here is the hamlet of Grimpen, where our friend Dr. Mortimer has his headquarters. Within a radius of five miles there are, as you see, only a very few scattered dwellings. Here is Lafter Hall, which was mentioned in the narrative. There is a house indicated here which may be the residence of the naturalist—Stapleton, ...
— Hound of the Baskervilles • Authur Conan Doyle

... same regard that the Scotchman is supposed to entertain towards whisky—some are better than others, but there are no really bad ones. The Pointing Man (HUTCHINSON) is better than most, in the first place because it takes us "east of Suez"—a pleasant change from the four-mile radius to which the popular sleuths of fiction mostly confine their activities; and, secondly, because it combines a maximum of sinister mystery with a minimum of actual bloodshed; and, lastly, because ...
— Punch, or the London Charivari, Vol. 153, August 1, 1917. • Various


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