pin·nule /ˈpɪn(ˌ)ju(ə)l/
羽枝
Pin·nule n.
1. Bot. One of the small divisions of a decompound frond or leaf. See Illust. of Bipinnate leaf, under Bipinnate.
2. Zool. 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.
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pinnule
n : division of a usually pinnately divided leaf [syn: pinna]