Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun 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.

from The Century Dictionary.

  • noun A great carnivorous dinosaur from the Upper Cretaceous (Laramie) of North America, characterized by its small fore limbs, greatly elongated hind limbs inclosing large hollow cavities, and huge serrated teeth of which thirteen are present in the upper jaw and twelve or thirteen in the dentary. This dinosaur walked erect, as a biped, supporting the weight of the body on the hind limbs and tail.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A large carnivorous dinosaur, of the genus Tyrannosaurus, found in North America during the late Cretaceous period.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun 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

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek τύραννος (turannos, "tyrant") + σαῦρος (sauros, "lizard").

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