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Unity :: Unity (n.) Any definite quantity, or aggregate of quantities or magnitudes taken as one, or for which 1 is made to stand in calculation; thus, in a table of natural sines, the radius of the circle is regarded as unity..

Radiuses :: Radiuses (pl. ) of Radiu.

Radius :: Radius (n.) A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.

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..

Radius :: Radius (n.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla..

Spoke :: Spoke (n.) The radius or ray of a wheel; one of the small bars which are inserted in the hub, or nave, and which serve to support the rim or felly..

Radius :: Radius (n.) The barbs of a perfect feather.

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..

Radian :: Radian (n.) An arc of a circle which is equal to the radius, or the angle measured by such an arc..

Epipodiale :: Epipodiale (n.) One of the bones of either the forearm or shank, the epipodialia being the radius, ulna, tibia, and fibula..

Ray :: Ray (n.) A radiating part of a flower or plant; the marginal florets of a compound flower, as an aster or a sunflower; one of the pedicels of an umbel or other circular flower cluster; radius. See Radius..

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..

Eccentric :: Eccentric (n.) A circle described about the center of an elliptical orbit, with half the major axis for radius..

Radius :: Radius (n.) The movable limb of a sextant or other angular instrument.

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..

Ulna :: Ulna (n.) The postaxial bone of the forearm, or branchium, corresponding to the fibula of the hind limb. See Radius..

Hanse :: Hanse (n.) That part of an elliptical or many-centered arch which has the shorter radius and immediately adjoins the impost.

Tangent :: Tangent (v. t.) A tangent line curve, or surface; specifically, that portion of the straight line tangent to a curve that is between the point of tangency and a given line, the given line being, for example, the axis of abscissas, or a radius of a circle produced. See Trigonometrical function, under Function..

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..

Apsis :: Apsis (n.) In a curve referred to polar coordinates, any point for which the radius vector is a maximum or minimum..

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