corythosaur

Definitions of corythosaur
  1. noun
    duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
    synonyms: corythosaurus
    see moresee less
    type of:
    duck-billed dinosaur, hadrosaur, 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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