Dictionary
di•ap•sid
Pronunciation: (dī-ap'sid), [key]—
adj.
(of reptiles) having two openings in the skull behind each eye, characteristic of the subclasses Lepidosauria and Archosauria, including all living reptiles except turtles.
—
n.
a diapsid reptile. Cf.
anapsid.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.