Noun
a theropod dinosaur of the genus Eoraptor
Source: WordNetThe early forms Herrerasaurus (large), Eoraptor (small) and a Plateosaurus skull There were three general dinosaur faunas in the late Cretaceous. Source: Internet
Paleontologists suspect Eoraptor resembles the common ancestor of all dinosaurs; Hayward, T. (1997). Source: Internet