/ti ran"euh sawr', tuy-/ , n.
a large, carnivorous dinosaur, Tyrannosaurus rex, from the Late Cretaceous Epoch of North America, that walked erect on its hind feet. See illus. under dinosaur .
[ Tyrannosaurus (1905), equiv. to Gk tyranno- (comb. form repr. týrannos TYRANT) + saûros -SAUR ]