DIAPSID
- (of reptiles) having two openings in the skull behind each eye, characteristic of the subclasses Lepidosauria and Archosauria, including all living reptiles except turtles
- diapsid reptile
- of a reptile, having two pairs of temporal openings [adj] / a diapsid reptile [n -S]
- a reptile with two pairs of temporal openings in the skull [n DIAPSIDS]