Ceratopsia
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| Noun | 1. | Ceratopsia - horned dinosaurs animal order - the order of animals Marginocephalia, marginocephalian, suborder Marginocephalia - includes boneheaded (pachycephalosaurs) and horned (ceratopsian) dinosaurs ceratopsian, horned dinosaur - any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia Ceratopsidae, family Ceratopsidae - American ceratopsian dinosaurs genus Protoceratops - small horned dinosaurs genus Triceratops - genus of herbivorous horned dinosaurs genus Styracosaurus - genus of horned dinosaurs genus Psittacosaurus - most primitive genus of horned dinosaurs; early Cretaceous |
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