- ceratosaur, ceratosaurus - 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
--1 is a kind of theropod, theropod dinosaur, bird-footed dinosaur
--1 is a member of suborder Ceratosaura
--1 has particulars: coelophysis