Definition of radius
- 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.