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Definitions of ornithischia
  1. noun
    extinct terrestrial reptiles having bird-like pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)

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Definition that contains ornithischia
  • stegosaurus herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon
  • genus pisanosaurus primitive ornithischian dinosaur found in Argentina; early Triassic
  • stegosaur stenops herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon
  • genus staurikosaurus primitive ornithischian dinosaur found in Brazil
  • stegosaur herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon
  • hadrosaur any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
  • duck-billed dinosaur any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
  • hadrosaurus any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
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