Tyrannosaurus rex

[ ti-ran-uh-sawr-uhs reks, tahy‐ ]

noun

1. tyrannosaur ( def ).

Tyrannosaurus rex

1. A large, carnivorous ( see carnivore ) dinosaur that walked on two legs. Its name is from the Greek words meaning “tyrant” and “lizard” and the Latin word for “king.”

Word History and Origins

Origin of Tyrannosaurus rex¹

First recorded in 1905–10; New Latin Tyrannosaurus, the genus name; tyrannosaur ( def ) + Latin rex “king”; rex ( def )