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tyrannosaur

tyrannosaur [ ti ránnə sawr ] (plural tyrannosaurs) or tyrannosaurus [ ti ránnə sáwrəss ] (plural tyrannosauruses) or tyrannosaurus rex [ ti ránnə sáwrəss réks ] (plural tyrannosaurus rexes)


noun 
Definition:
 
large dinosaur: a large fierce flesh-eating dinosaur that walked on powerful hind legs and had small front legs. It lived during the Cretaceous Period and was the largest carnivore.

[Early 20th century. < modern Latin Tyrannosaurus< Greek turannos 'tyrant' + sauros 'lizard']
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