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Any of various theropod dinosaurs of the group Ceratosauria of the Triassic and Jurassic Periods, often with a crest or horn on the head, and including coelophysis and dilophosaurus.
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|Noun||1.||ceratosaur - primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America|
bird-footed dinosaur, theropod, theropod dinosaur - any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs
suborder Ceratosaura - primitive saurischian dinosaurs
coelophysis - one of the oldest known dinosaurs; late Triassic; cannibalistic