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Tyrannosaurus (s) (noun), Tyrannosauri, Tyrannosauruses (pl)
A very large carnivorous dinosaur of the genus Tyrannosaurus: The Tyrannosaurus is a "tyrant (despot) lizard” from Late Cretaceous western North America and China. This fossil has also been called "Dynamosaurus", "Tarbosaurus", and "Manospondylus". It was named by the U.S. paleontologist Henry Fairfield Osborn in 1905.