Definition of tyrannosaur in English:

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Pronunciation: /təˈranəˌsôr/
(also tyrannosaurus /təˌranəˈsôrəs/)


A very large bipedal carnivorous dinosaur of the late Cretaceous period, with powerful jaws and small clawlike front legs.
  • Family Tyrannosauridae, infraorder Carnosauria, suborder Theropoda: several species, in particular Tyrannosaurus rex.
Example sentences
  • Because feathers are a unique feature, they are thought to be characteristic of many theropod dinosaurs, including tyrannosaurs.
  • Most predatory dinosaurs such as tyrannosaurs and velociraptors have usually been depicted in museums, films and books as covered in a thick hide of dull brown or green skin.
  • Today's bullies of the Serengeti plains, lions and spotted hyenas, were paralleled by tyrannosaurs in Jurassic and Cretaceous ecosystems.


Modern Latin, from Greek turannos 'tyrant' + sauros 'lizard', on the pattern of dinosaur.

For editors and proofreaders

Syllabification: ty·ran·no·saur

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