hadrosaur

American  

[had-ruh-sawr] / ˈhæd rəˌsɔr /

noun

1. a bipedal dinosaur of the genus Hadrosaurus, belonging to the ornithopod family Hadrosauridae of the late Cretaceous Period, having broad, flat jaws for scooping up water plants.

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hadrosaur British  

/ ˌhædrəˈsɔːrəs, ˈhædrəˌsɔː /

noun

1. Also called: duck-billed dinosaur.  any one of a large group of bipedal Upper Cretaceous dinosaurs of the genus Anatosaurus , Maiasaura , Edmontosaurus , and related genera: partly aquatic, with a duck-billed skull and webbed feet

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hadrosaur Scientific  

/ hăd′rə-sôr′ /

1. 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.

2. Also called duck-billed dinosaur

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Other Word Forms

• hadrosaurian adjective

Etymology

Origin of hadrosaur

< New Latin Hadrosaurus (1858) genus name, equivalent to Greek hadr ( ós ) thick, bulky + -o- -o- + saûros -saur

Example Sentences

They overshadowed all other dinosaurs, from the duck-billed hadrosaurs and the horned ceratopsians to the armored ankylosaurs and predatory tyrannosaurs.

From Scientific American

“Another hadrosaur toe, another triceratops vertebra. Other than statistical appearance in the formation, there’s zero scientific value.”

From New York Times

Anecdotally, the team heard a number of stories from colleagues finding more patches of fossilized skin in the field than they expected, particularly when excavating hadrosaurs.

From New York Times

Most of the footprints from roughly 75 million years ago in the late Cretaceous were made by hadrosaurs, which were duck-billed herbivores.

From Washington Post

The exposed fossil protrudes from a hillside in Dinosaur Provincial Park in Alberta, Canada, revealing part of the hadrosaur’s tail and right hind foot.

From Washington Times