any of a suborder (Theropoda) of flesh-eating saurischian dinosaurs that walked mainly on the hind legs
See theropod in American Heritage Dictionary 4
(thîrˈə-pŏdˌ)
noun
Any of various large carnivorous saurischian dinosaurs of the suborder Theropoda of the Jurassic and Cretaceous periods, characterized by bipedal locomotion, large jaws, and short forelimbs.