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n. pl. pen·nae (pĕn′ē)
A contour feather of a bird, as distinguished from a down feather or a plume.
pen·na′ceous (pĕ-nā′shəs) adj.
n, pl -nae (-niː)
(Zoology) ornithol any large feather that has a vane and forms part of the main plumage of a bird
n., pl. pen•nae (ˈpɛn i)
a contour feather, as distinguished from a down feather.
[< Latin: feather. See pen1]