[ pin-uh ]
/ ˈpɪn ə /

noun, plural pin·nae [pin-ee] /ˈpɪn i/, pin·nas.

Botany. one of the primary divisions of a pinnate leaf.
  1. a feather, wing, or winglike part.
  2. a fin or flipper.
Anatomy. auricle(def 1a).

Origin of pinna

1660–70; < Latin: feather, wing, fin

Related forms

pin·nal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pinna

British Dictionary definitions for pinna


/ (ˈpɪnə) /

noun plural -nae (-niː) or -nas

any leaflet of a pinnate compound leaf
zoology a feather, wing, fin, or similarly shaped part
another name for auricle (def. 2)

Word Origin for pinna

C18: via New Latin from Latin: wing, feather, fin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for pinna


[ pĭnə ]

n. pl. pin•nae (pĭnē)


Related forms

pinnal adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for pinna


[ pĭnə ]

Plural pinnae (pĭnē) pinnas

A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.