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|Noun||1.||ornithischian dinosaur - herbivorous dinosaur with a pelvis like that of a bird|
dinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic era
order Ornithischia, Ornithischia - extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)
armored dinosaur - dinosaurs having bony armour
bone-headed dinosaur - bipedal herbivorous dinosaurs with bony crowns
ceratopsian, horned dinosaur - any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
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