Source : Webster's Revised Unabridged Dictionary (1913)

Pteryla \Pte*ry"la\, n.; pl. {Pteryl[ae]}. [NL., fr. Gr. ?
   feather + ? wood, forest.] (Zo["o]l.)
   One of the definite areas of the skin of a bird on which
   feathers grow; -- contrasted with apteria.

Source : WordNet®

pterylae
     See {pteryla}