Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of pterylae is as below...

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

Pterylae :: Pterylae (pl. ) of Pteryl.

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

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

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