Hypertext Webster Gateway: "pinnule"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Pinnule \Pin"nule\, n. [L. pinnula, dim. of pinna feather: cf.
F. pinnule.]
1. (Bot.) One of the small divisions of a decompound frond or
leaf. See Illust. of {Bipinnate leaf}, under {Bipinnate}.
2. (Zo["o]l.) 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.
From WordNet (r) 1.7 (wn)
pinnule
n : division of a usually pinnately divided leaf [syn: {pinna}]
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