[ pin-uh ]
/ ˈpɪn ə /
noun, plural pin·nae [pin-ee] /ˈpɪn i/, pin·nas.
Botany. one of the primary divisions of a pinnate leaf.
- a feather, wing, or winglike part.
- a fin or flipper.
Anatomy. auricle(def 1a).
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“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.
Origin of pinna
1660–70; < Latin: feather, wing, fin
OTHER WORDS FROM pinnapin·nal, adjective
Words nearby pinna
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for pinnal
/ (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
Medical definitions for pinnal
[ pĭn′ə ]
n. pl. pin•nae (pĭn′ē)
Other words from pinnapin′nal adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for pinnal
[ pĭn′ə ]
Plural pinnae (pĭn′ē) 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.