hadrosaur

had·ro·saur  (hdr-sôr)

n.

Any of various amphibious dinosaurs of the genus Anatosaurus and related genera that had webbed feet and a ducklike bill. Also called duckbill, duck-billed dinosaur.

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[New Latin Hadrosaurus, genus name : Greek hadros, thick; see hadron + sauros, lizard.]

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hadrosaur  (hdr-sôr)

Any of various medium-sized to large dinosaurs of the group Hadrosauroidea of the Cretaceous Period. Hadrosaurs had a duck-like bill and a mouth containing many series of rough grinding teeth for chewing tough plants. They walked on two legs or on all fours and had hoofed feet. Many hadrosaurs bore hollow crests on their skulls. They were the last and largest ornithopod dinosaurs. Also called duck-billed dinosaur.

Thesaurus

Noun

1.

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, hadrosaurus ornithischian, ornithischian dinosaur - herbivorous dinosaur with a pelvis like that of a bird family Hadrosauridae, Hadrosauridae - duck-billed dinosaurs; upper Cretaceous anatotitan - one of the largest and most famous duck-billed dinosaurs corythosaur, corythosaurus - duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet edmontosaurus - duck-billed dinosaur from Canada found as a fossilized mummy with skin trachodon, trachodont - large duck-billed dinosaur of the Cretaceous period