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Webster 1913 Edition

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Noun.

;

pl.

Pterylæ

(#)

[NL., fr. Gr. [GREEK] feather + [GREEK] wood, forest.]

(Zool.)

One of the definite areas of the skin of a bird on which feathers grow; – contrasted with

apteria

pteryla ‎(plural pterylas or pterylae)