Radiuses
Radius Ra"di*us (r[=a]"d[i^]*[u^]s), n.; pl. L. {Radii} (r[=a]"d[i^]*[imac]); E. {Radiuses} (r[=a]"d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See {Ray} a divergent line.] 1. (Geom.) A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere. [1913 Webster]

2. (Anat.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of {Artiodactyla}. [1913 Webster]

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. [1913 Webster]

3. (Bot.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See {Ray}, 2. [1913 Webster]

4. pl. (Zo["o]l.) (a) The barbs of a perfect feather. (b) Radiating organs, or color-markings, of the radiates. [1913 Webster]

5. The movable limb of a sextant or other angular instrument. --Knight. [1913 Webster]

{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}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • radiuses — ra·di·us || reɪdɪəs n. straight line drawn from the center of a circle to the circumference; one of the bones of the forearm …   English contemporary dictionary

  • radius — [ reɪdɪəs] noun (plural radii dɪʌɪ or radiuses) 1》 a straight line from the centre to the circumference of a circle or sphere.     ↘a radial line from the focus to any point of a curve. 2》 a specified distance from a centre in all directions:… …   English new terms dictionary

  • Radii — Radius Ra di*us (r[=a] d[i^]*[u^]s), n.; pl. L. {Radii} (r[=a] d[i^]*[imac]); E. {Radiuses} (r[=a] d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See {Ray} a divergent line.] 1. (Geom.) A right line drawn or extending from… …   The Collaborative International Dictionary of English

  • Radius — Ra di*us (r[=a] d[i^]*[u^]s), n.; pl. L. {Radii} (r[=a] d[i^]*[imac]); E. {Radiuses} (r[=a] d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See {Ray} a divergent line.] 1. (Geom.) A right line drawn or extending from the… …   The Collaborative International Dictionary of English

  • Radius bar — Radius Ra di*us (r[=a] d[i^]*[u^]s), n.; pl. L. {Radii} (r[=a] d[i^]*[imac]); E. {Radiuses} (r[=a] d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See {Ray} a divergent line.] 1. (Geom.) A right line drawn or extending from… …   The Collaborative International Dictionary of English

  • Radius of curvature — Radius Ra di*us (r[=a] d[i^]*[u^]s), n.; pl. L. {Radii} (r[=a] d[i^]*[imac]); E. {Radiuses} (r[=a] d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See {Ray} a divergent line.] 1. (Geom.) A right line drawn or extending from… …   The Collaborative International Dictionary of English

  • radius — noun (plural radii; also radiuses) Etymology: Latin, ray, radius Date: circa 1611 1. a line segment extending from the center of a circle or sphere to the circumference or bounding surface 2. a. the bone on the thumb side of the human forearm;… …   New Collegiate Dictionary

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