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 (sense ).
[Latin, feather.]
pinnal pin'nal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
