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pinna definition

pinna (pin′ə)

noun pl. pinnae -·nae (-ē) or pinnas -·nas

  1. Anat. the external ear; auricle
  2. Bot. a primary division of a pinnately compound leaf, esp. of a fern leaf
  3. Zool. a feather, wing, fin, or similar structure

Etymology: L, a feather: see pen

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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