Category:Pinnule

Pin"nule, n. Etym: [l. pinnula, dim. of pinna feather: cf. F. Pinnule.]

1. (bot.)

Defn: one of the small divisions of a decompound frond or leaf. See Illust. of bipinnate leaf, under bipinnate.

2. (zoöl.)

Defn: any one of a series of small, slender organs, or parts, when Arranged in rows so as to have a plumelike appearance; as, a pinnule Of a gorgonia; the pinnules of a crinoid.