diapsids
Scientific term for a group of reptiles with two temporal fenestrae, including lizards, snakes, crocodilians, dinosaurs, and birds. Used in paleontology and zoology.
Diapsids include crocodilians and birds.
Anapsids, a group lacking temporal fenestrae, traditionally including turtles.
From 双 (sō, 'pair') + 弓 (kyū, 'arch') + 類 (rui, 'group'), referring to the two temporal arches in the skull.