PTER´YGOID (_bone_), _n._ A slender bone connecting the quadrate with
the palatine.
PTER´YLA, _n._; pl. _pterylæ_. Area or _tract_ on the skin where
feathers grow.
PTERYLOG´RAPHY, _n._ A description of the plumage, especially with
reference to the distribution of the feathers on the skin.
PTERYLO´SIS, _n._ Plumage, considered with reference to its distribution
on the skin.