Dictionary
the•rap•sid
Pronunciation: (thu-rap'sid), [key]—
n.
any of various groups of mammallike reptiles of the extinct order Therapsida, inhabiting all continents from mid-Permian to late Triassic times, some of which were probably warm-blooded and directly ancestral to mammals.
—
adj.
of or pertaining to the Therapsida.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.