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

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

From New York Times • Jul. 17, 2023

To fossilize the tissue so well, the hadrosaur corpse would have had to have been covered up quickly.

From Washington Times • Sep. 14, 2022

Tracks of a backhoe are visible over an unknown number of tracks, including a crocodile resting trace and hadrosaur tracks, according to reports from Kirkland, Roberts, and others who visited Mill Canyon on Sunday.

From Science Magazine • Jan. 31, 2022

“At the hadrosaur site, we were digging under what we had already plastered and taken away when another volunteer and I ended up finding a rib,” she said.

From Seattle Times • Oct. 24, 2021

From what little is known now, it is thought to have belonged to a hadrosaur, a large duck-billed dinosaur.

From "A Short History of Nearly Everything" by Bill Bryson