pinnae

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pin⋅na

[pin-uh]

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–noun, plural pin⋅nae [pin-ee]

, pin⋅nas.

1.	Botany. one of the primary divisions of a pinnate leaf.

Zoology.

a.	a feather, wing, or winglike part.

b.	a fin or flipper.

3.	Anatomy. auricle (def. 1a).

Origin:
1660–70; < L: feather, wing, fin

Related forms:

pinnal, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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pin·na (pĭn'ə)

n. pl. pin·nae (pĭn'ē) or pin·nas

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

[Latin, feather; see pet- in Indo-European roots.]
pin'nal adj.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: pin·na
Pronunciation: 'pin-&
Function: noun
Inflected Form: plural pin·nae /'pin-"E, -"I/ or pinnas
: the largely cartilaginous projecting portion of the external ear —pin·nal /'pin-^&l/ adjective

Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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

pin'nal adj.

Science Dictionary

pinna (pĭn'ə) Pronunciation Key
Plural pinnae (pĭn'ē) or pinnas
A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.

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