Dictionary
pin•na
Pronunciation: (pin'u), [key]—
n.,
—pl. pin•naePronunciation: (pin'ē), [key] pin•nas.
1. Bot.one of the primary divisions of a pinnate leaf.
2. Zool.
a. a feather, wing, or winglike part.
b. a fin or flipper.
3. Anat.auricle (def. 1a).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.