follow Dictionary.com

Get the details behind our redesign

pinna

[pin-uh] /ˈpɪn ə/
noun, plural pinnae
[pin-ee] /ˈpɪn i/ (Show IPA),
pinnas.
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
1660-1670
1660-70; < Latin: feather, wing, fin
Related forms
pinnal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for pinnal

pinna

/ˈpɪnə/
noun (pl) -nae (-niː), -nas
1.
any leaflet of a pinnate compound leaf
2.
(zoology) a feather, wing, fin, or similarly shaped part
3.
another name for auricle (sense 2)
Word Origin
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
Cite This Source
pinnal in Medicine

pinna pin·na (pĭn'ə)
n. pl. pin·nae (pĭn'ē)
See auricle.


pin'nal adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
pinnal in Science
pinna
  (pĭn'ə)   
Plural pinnae (pĭn'ē) or pinnas
A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of The Day

Difficulty index for pinna

Some English speakers likely know this word

Word Value for pinnal

8
12
Scrabble Words With Friends