Definition of "pinna" [pin•na]

• Botany A leaflet or primary division of a pinnately compound leaf. (noun)
• Zoology A feather, wing, fin, or similar appendage. (noun)
• Anatomy See auricle. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "“And after all, didn’t somebody just make up the word pinna, too?”"
• "In the pinna also is found the so-called pinna-guard."
• "The external ear consists of an expanded portion known as the pinna or _auricle_, and of a passage, the auditory canal or _meatus_, leading inwards from it."