Noun: psittacosaur
- Primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedal
"The psittacosaur is considered an early ancestor of later ceratopsians";
- psittacosaurus
Derived forms: psittacosaurs
Type of: ceratopsian, horned dinosaur
Part of: genus Psittacosaurus