Radius

['reɪdɪəs] or ['redɪəs]

Definition

(noun.) the length of a line segment between the center and circumference of a circle or sphere.

(noun.) the outer and slightly shorter of the two bones of the human forearm.

(noun.) a circular region whose area is indicated by the length of its radius; 'they located it within a radius of 2 miles'.

(noun.) a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere).

Checked by Bonnie--From WordNet

Definition

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

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

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

(n.) The barbs of a perfect feather.

(n.) Radiating organs, or color-markings, of the radiates.

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

Edited by Julia

Definition

n. (geom.) a straight line from the centre to the circumference of a circle: anything like a radius as the spoke of a wheel: a ray: (anat.) the exterior bone of the arm: (bot.) the ray of a flower: the movable arm of a sextant: one of the radiating lines of a geometrical spider's web:—pl. Rā′dii (ī).—ns. Rā′dius-bar -rod in a steam-engine a rod pivoted at one end and connected at the other with a concentrically moving part at a fixed distance.—Radius vector (pl. Radii vectores) the distance from a fixed origin to any point of a curve.

Checked by Balder

Examples

Editor: Rosalie

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