corythosaur

Thesaurus

Noun

1.corythosaur - duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmetcorythosaurusduck-billed dinosaur, hadrosaur, hadrosaurus - any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquaticgenus Corythosaurus - genus of duck-billed dinosaurs of late Cretaceous