Meaning of pinna

pin•na

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