pinna

[pin-uh]
noun, plural pin·nae [pin-ee] /ˈpɪn i/, pin·nas.
  1. Botany. one of the primary divisions of a pinnate leaf.
  2. Zoology.
    1. a feather, wing, or winglike part.
    2. a fin or flipper.
  3. Anatomy. auricle(def 1a).

Origin of pinna

1660–70; < Latin: feather, wing, fin
Related formspin·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for pinnae

pinna

noun plural -nae (-niː) or -nas
  1. any leaflet of a pinnate compound leaf
  2. zoology a feather, wing, fin, or similarly shaped part
  3. 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

pinnae in Medicine

pinna

[pĭnə]
n. pl. pin•nae (pĭnē)
  1. auricle
Related formspinnal adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

pinnae in Science

pinna

[pĭnə]
Plural pinnae (pĭnē) pinnas
  1. 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.