PTERYLA
Pte*ry"la, n.; pl. Pterylæ. Etym: [NL., fr. Gr. (Zoöl.)
Defn: One of the definite areas of the skin of a bird on which feathers grow; — contrasted with apteria.
PTERYLOGRAPHY
Pter`y*log"ra*phy, n. Etym: [Pteryla + -graphy.] (Zoöl.)
Defn: The study or description of the arrangement of feathers, or of the pterylæ, of birds.
PTERYLOSIS
Pter`y*lo"sis, n. Etym: [NL., fr. NL. & E. pteryla.] (Zoöl.)
Defn: The arrangement of feathers in definite areas.
PTILOCERQUE
Ptil"o*cerque, n. Etym: [Gr. (Zool.)
Defn: The pentail.
PTILOPAEDES
Ptil`o*pæ"des, n. pl. Etym: [NL., fr. Gr. (Zoöl.)
Defn: Same as Dasypædes.