/duy ap"sid/ , adj.
1. (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.
2. a diapsid reptile. Cf. anapsid .
[ Diapsida (1903); see DI- 1 , ANAPSID ]