any large carnivorous bipedal dinosaur of the genus Tyrannosaurus, common in North America in upper Jurassic and Cretaceous times: suborder Theropoda (theropods)
[C19: from New Latin, from Greek turannostyrant + sauros lizard]
tyrannosaurortyrannosaur
—n
[C19: from New Latin, from Greek turannostyrant + sauros lizard]
carnivorous Cretaceous bipedal dinosaur, 1905, Mod.L., the genus name, coined by H.F. Osborn (published 1906 in "Bulletin of the American Museum of Natural History" XXI, p.259) from Gk. tyrannos "tyrant" + sauros "lizard."