ty·ran·no·sau·rus /təˌrænəˈsɔrəs, (ˌ)taɪ-/
  暴龍
  tyrannosaurus
       n : 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 [syn: tyrannosaur, Tyrannosaurus rex]