1. 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
   "The ceratosaur's horn may have been used in mating displays";
   - ceratosaurus

Derived forms: ceratosaurs

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

Part of: suborder Ceratosaura

Encyclopedia: Ceratosaur