Definitions for duck-billed dinosaurˈdʌkˌbɪld
Random House Webster's College Dictionary
Ref: hadrosaur .
hadrosaur, hadrosaurus, duck-billed dinosaur(noun)
any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
An informal name for ornithopod dinosaurs of the family Hadrosauridae derived from the similarity of the heads of certain members of that family to those of modern ducks.
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