hadrosaur

[ had-ruh-sawr ]

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.

hadrosaur

/ ˌhædrəˈsɔːrəs; ˈhædrəˌsɔː /

noun

1. 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 Also calledduck-billed dinosaur

hadrosaur

/ 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

Other Words From

• hadro·sauri·an adjective

Word History and Origins

Origin of hadrosaur¹

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

Word History and Origins

Origin of hadrosaur¹

C19: from Greek hadros thick, fat + -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

One end of a roughly three-mile-long stretch of coastline is littered with tracks made by juvenile hadrosaurs.

From Washington Post

An international group of scientists working in Canada uncovered a fossil of a hadrosaur, a duck-billed dinosaur, complete with rare fossilized skin.

From Washington Times