some of different amphibious dinosaurs of genus Anatosaurus and associated genera that had webbed legs and a ducklike costs. Also called duckbill, duck-billed dinosaur.
Any ornithopod dinosaur of this family Hadrosauridae.
Any person in the genus Hadrosaurus or family Hadrosauridae, an extinct group of heavy bipedal partly aquatic dinosaurs with duck-billed head and webbed legs; of this Upper Cretaceous in the united states.
any of many large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; might have been partially aquatic