Vocabulary : Pterygoquadrate to Ptilosis

Pterygoquadrate : Of, pertaining to, or representing the pterygoid and quadrate bones or cartilages.
Pteryla : One of the definite areas of the skin of a bird on which feathers grow; -- contrasted with apteria.
Pterylae : of Pteryla
Pterylography : The study or description of the arrangement of feathers, or of the pterylae, of birds.
Pterylosis : The arrangement of feathers in definite areas.

Ptilocerque : The pentail.
Ptilopaedes : Same as Dasypaedes.
Ptilopaedic : Having nearly the whole surface of the skin covered with down; dasypaedic; -- said of the young of certain birds.
Ptilopteri : An order of birds including only the penguins.
Ptilosis : Same as Pterylosis.

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