had·​ro·​saur | \ ˈha-drə-ˌsȯr How to pronounce hadrosaur (audio) \

Definition of hadrosaur

: any of a genus (Hadrosaurus) or family (Hadrosauridae) of mainly bipedal dinosaurs of the Late Cretaceous that have the forward part of the jaws toothless and flattened into a beak-like snout and the back part of the jaws filled with rows of numerous small, grinding teeth and that often have a solid or hollow bony crest on the skull : duck-billed dinosaur … the hadrosaurs evolved into some 21 different species during their 20 million-year stint on earth …— Virginia Morell

Examples of hadrosaur in a Sentence

Recent Examples on the Web The bones of paddlefish and sturgeons who died in the Chicxulub Impact indicated that the asteroid struck in the spring, and a hadrosaur in Blagoveshchensk was presumed to have broken its ulna while eating leaves or mating. Rafil Kroll-zaidi, Harper’s Magazine , 27 Apr. 2022 In the 1980s, Bruce Stinchcomb, a paleontology student studying Gilmore and Stewart's, analyzed the old bones and identified them as belonging to a hadrosaur, or duck-billed dinosaur, per CNN. Elizabeth Gamillo, Smithsonian Magazine, 2 Dec. 2021 Look for the world's largest giant squid fossil, a prehistoric turtle the size of a Volkswagen Beetle, and a rare 67 million-year-old mummified hadrosaur with skin and scales visible. Simon Peter Groebner, Star Tribune, 23 July 2021 Studies of dinosaur growth have indicated that hadrosaurs rapidly packed on the pounds as a defense against carnivores, so an adult hadrosaur represents the size threshold when potential lunch became too much of a bother. Riley Black, Smithsonian Magazine, 10 May 2021 In a Cretaceous Research study, paleontologists described a new species of hadrosaur found in Morocco. Riley Black, Smithsonian Magazine, 23 Dec. 2020 Others turn out to be familiar—a duckbill dinosaur previously thought to be a new species has turned out to be Edmontosaurus, a wide-ranging hadrosaur found elsewhere. Riley Black, Smithsonian Magazine, 3 Dec. 2020 In March, a study was published that looked at the fossilized teeth of a hadrosaur and concluded that its journeys were short, roughly 50 miles. Chris Ciaccia, Fox News, 20 Sep. 2020 In March, a study was published that looked at the fossilized teeth of a hadrosaur and concluded that its journeys were short, roughly 50 miles. Chris Ciaccia, Fox News, 20 Sep. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hadrosaur.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of hadrosaur

1877, in the meaning defined above

History and Etymology for hadrosaur

New Latin Hadrosaurus, genus name, from Greek hadros thick, bulky + sauros lizard

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The first known use of hadrosaur was in 1877

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Last Updated

28 Apr 2022

Cite this Entry

“Hadrosaur.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hadrosaur. Accessed 20 May. 2022.

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Britannica.com: Encyclopedia article about hadrosaur


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