(1):

(n.) The barbs of a perfect feather.

(2):

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

(3):

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

(4):

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

(5):

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

(6):

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