pinnules

pinnule

[pin-yool]
noun
1.
Zoology.
a.
a part or organ resembling a barb of a feather, a fin, or the like.
b.
a finlet.
2.
Botany. a secondary pinna, one of the pinnately disposed divisions of a bipinnate leaf.
3.
a metal plate with a small hole in it, used as a sight in a quadrant.

Origin:
1585–95; < Latin pinnula pinnula

pinnular [pin-yuh-ler] , adjective
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World English Dictionary
pinnule or pinnula (ˈpɪnjuːl, ˈpɪnjʊlə)
 
n , pl pinnules, pinnulae
1.  any of the lobes of a leaflet of a pinnate compound leaf, which is itself pinnately divided
2.  zoology any feather-like part, such as any of the arms of a sea lily
 
[C16: from Latin pinnula, diminutive of pinna feather]
 
pinnula or pinnula (ˈpɪnjuːl, ˈpɪnjʊlə, ˈpɪnjʊˌliː)
 
n
 
[C16: from Latin pinnula, diminutive of pinna feather]
 
'pinnular or pinnula
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
pinnule   (pĭn'yl)  Pronunciation Key 
Any of the smaller leaflets into which each leaflet of a bipinnately compound leaf is subdivided. The leaves of many ferns are divided into pinnules.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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