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tyrannosaurus

/tɪˌrænəˈsɔːrəs/
noun
1.
any large carnivorous bipedal dinosaur of the genus Tyrannosaurus, common in North America in upper Jurassic and Cretaceous times: suborder Theropoda (theropods)
Word Origin
C19: from New Latin, from Greek turannostyrant + sauros lizard
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for tyrannosaurus
tyrannosaurus
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."
Online Etymology Dictionary, © 2010 Douglas Harper
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