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 (tĭ-răn′ə-sôr′əs, tī-)
1. Any of various tyrannosaurid dinosaurs of the genus Tyrannosaurus, having a large head and teeth and short forelimbs, and including T. rex and possibly some other species. Also called tyrannosaur.
2. See T. rex.

[New Latin Tyrannosaurus, genus name : Greek turannos, tyrant + sauros, lizard.]


(tɪˌrænəˈsɔːrəs) or


(Palaeontology) 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 turannos tyrant + sauros lizard]


(tĭ-răn′ə-sôr′əs) also ty·ran·no·saur (tĭ-răn′ə-sôr′)
A very large meat-eating dinosaur of the Cretaceous Period. It had very small forelimbs and a large head with sharp teeth. It walked on two legs, probably bent forward with its long tail stretched out as a counterbalance. Tyrannosaurs grew to lengths of 47 feet (14.3 meters) or more.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tyrannosaurus - large carnivorous bipedal dinosaur having enormous teeth with knifelike serrationstyrannosaurus - large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; later Cretaceous period in North America
bird-footed dinosaur, theropod, theropod dinosaur - any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs
genus Tyrannosaurus - includes a single species

tyrannosaurus (rex)

nTyrannosaurus rex m