English definition of Pteryla

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Definition of pteryla

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Pteryla (n.) One of the definite areas of the skin of a bird on which feathers grow; -- contrasted with apteria.

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Pteryla :: Pteryla (n.) One of the definite areas of the skin of a bird on which feathers grow; -- contrasted with apteria.

Pterylography :: Pterylography (n.) The study or description of the arrangement of feathers, or of the pterylae, of birds..

Pterylae :: Pterylae (pl. ) of Pteryl.

Psilopaedic :: Psilopaedic (a.) Having down upon the pterylae only; -- said of the young of certain birds.

Psilopaedes :: Psilopaedes (n. pl.) birds whose young at first have down on the pterylae only; -- called also Gymnopaedes.