Tyrannosaur meaning

tĭ-rănə-sôr, tī-
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Any of a genus (Tyrannosaurus) of huge, bipedal, flesh-eating theropod dinosaurs of the Upper Cretaceous Period in North America and Asia, esp. the largest species (Tyrannosaurus rex)
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Any of various very large carnivorous dinosaurs of the genus Tyrannosaurus and related genera of the Cretaceous Period. Tyrannosaurs had very small forelimbs and a large head with sharp teeth. They walked on two legs, probably bent forward with their long tail stretched out as a counterbalance. Tyrannosaurs were theropods and probably distantly related to birds. The largest species, T. rex, grew to lengths of 14.3 m (47 ft) or more and may have been the largest land predator that ever lived.
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Any large bipedal carnivorous dinosaur, of the family Tyrannosauridae, that lived in North America during the Cretaceous period.
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Origin of tyrannosaur