penna

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penna

(pĕn′ə)
n. pl. pennae (pĕn′ē)
A contour feather of a bird, as distinguished from a down feather or a plume.

pen·na′ceous (pĕ-nā′shəs) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.