Meaning of diapsid

di•ap•sid

Pronunciation: (dī-ap'sid), [key]
— 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.
  1. a diapsid reptile. Cf. anapsid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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