Definition of radius

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Radius (n.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2..

Lern More About Radius

Hypotrochoid :: Hypotrochoid (n.) A curve, traced by a point in the radius, or radius produced, of a circle which rolls upon the concave side of a fixed circle. See Hypocycloid, Epicycloid, and Trochoid..
Radius :: Radius (n.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2..
Radius :: Radius (n.) The barbs of a perfect feather.
Radius :: Radius (n.) Radiating organs, or color-markings, of the radiates..
Epipodiale :: Epipodiale (n.) One of the bones of either the forearm or shank, the epipodialia being the radius, ulna, tibia, and fibula..
Radii :: Radii (n.) pl. of Radius.
Radio- :: Radio- () A combining form indicating connection with, or relation to, a radius or ray; specifically (Anat.), with the radius of the forearm; as, radio-ulnar, radio-muscular, radio-carpal..
Radian :: Radian (n.) An arc of a circle which is equal to the radius, or the angle measured by such an arc..
Lituus :: Lituus (n.) A spiral whose polar equation is r2/ = a; that is, a curve the square of whose radius vector varies inversely as the angle which the radius vector makes with a given line..
Eccentric :: Eccentric (n.) A circle described about the center of an elliptical orbit, with half the major axis for radius..
Radius Vector :: Radius vector (n.) An ideal straight line joining the center of an attracting body with that of a body describing an orbit around it, as a line joining the sun and a planet or comet, or a planet and its satellite..
Radiale :: Radiale (n.) The bone or cartilage of the carpus which articulates with the radius and corresponds to the scaphoid bone in man.
Quicken :: Quicken (a.) To shorten the radius of (a curve); to make (a curve) sharper; as, to quicken the sheer, that is, to make its curve more pronounced..
Radiuses :: Radiuses (pl. ) of Radiu.
Apsis :: Apsis (n.) In a curve referred to polar coordinates, any point for which the radius vector is a maximum or minimum..
Radial :: Radial (a.) Of or pertaining to a radius or ray; consisting of, or like, radii or rays; radiated; as, (Bot.) radial projections; (Zool.) radial vessels or canals; (Anat.) the radial artery..
Radius :: Radius (n.) The movable limb of a sextant or other angular instrument.
Radius Vector :: Radius vector () A straight line (or the length of such line) connecting any point, as of a curve, with a fixed point, or pole, round which the straight line turns, and to which it serves to refer the successive points of a curve, in a system of polar coordinates. See Coordinate, n..
Throw :: Throw (n.) The extreme movement given to a sliding or vibrating reciprocating piece by a cam, crank, eccentric, or the like; travel; stroke; as, the throw of a slide valve. Also, frequently, the length of the radius of a crank, or the eccentricity of an eccentric; as, the throw of the crank of a steam engine is equal to half the stroke of the piston..
Radius :: Radius (n.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla..
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