| psittacosaur | (n) primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedal, Syn. psittacosaurus |
| genus psittacosaurus | (n) most primitive genus of horned dinosaurs; early Cretaceous |
| genus psittacosaurus | (n) most primitive genus of horned dinosaurs; early Cretaceous |
| psittacosaur | (n) primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedal, Syn. psittacosaurus |