Pronunciation: (thē'ku-dont"), [key]
any of various reptiles of the extinct order Thecodontia, occurring in the late Permian to late Triassic periods and characterized by teeth set in sockets.
1. having the teeth set in sockets.
2. belonging to or pertaining to the Thecodontia.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.