- a carnivorous dinosaur of the genus Antrodemus (formerly Allosaurus), from the late Jurassic Period of North America, that was about 30 feet (9 meters) long.
- any large carnivorous bipedal dinosaur of the genus Antrodemus (formerly Allosaurus), common in North America in late Jurassic times: suborder Theropoda (theropods)
