[pen-uh] 
[pen-ee] . Ornithology. | a contour feather, as distinguished from a down feather, plume, etc. |
| pen·na (pěn'ə) n. pl. pen·nae (pěn'ē) A contour feather of a bird, as distinguished from a down feather or a plume. [Latin, feather; see pet- in Indo-European roots.] pen·na'ceous (pě-nā'shəs) adj. |
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