Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: tyrannosaurus  ,tI,ra-nu'so-rus or ti,ra-nu'so-rus
  1. 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
    - tyrannosaur, Tyrannosaurus rex

Derived forms: tyrannosauruses

Type of: bird-footed dinosaur, theropod, theropod dinosaur

Part of: genus Tyrannosaurus

Encyclopedia: Tyrannosaurus