pennae

penna

[pen-uh]
noun, plural pennae [pen-ee] . Ornithology.
a contour feather, as distinguished from a down feather, plume, etc.

Origin:
< Latin: feather. See pen1

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World English Dictionary
penna (ˈpɛnə)
 
n , pl -nae
ornithol any large feather that has a vane and forms part of the main plumage of a bird
 
[Latin: feather]
 
pennaceous
 
adj

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