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n. pl. pi·le·a (-lē-ə)
The top of a bird's head, extending from the base of the bill to the nape.
[New Latin pīleum, from Latin pīleus, felt cap.]
n, pl -lea (-lɪə)
(Zoology) the top of a bird's head from the base of the bill to the occiput
[C19: New Latin, from Latin pileus]
pi•le•um(ˈpaɪ li əm, ˈpɪl i-)
n., pl. pi•le•a (ˈpaɪ li ə, ˈpɪl i ə)
the top of the head of a bird, from the base of the bill to the nape.
[1870–75; < New Latin; Latin pīleum, neuter variant of pīleus felt cap]