hadrosaur

noun

had·​ro·​saur ˈha-drə-ˌsȯr 

: 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

And while bonebeds with ankylosaurs, hadrosaurs, and sauropods have hinted at herd behavior, so, too, have deposited dino tracks, suggesting some dinosaurs had a distinct social streak. —Sam Walters, Discover Magazine, 28 Mar. 2024

This herbivorous hadrosaur apparently tended her eggs and raised her offspring for more than a year after hatching. —Roger S. Seymour, Discover Magazine, 5 Oct. 2023

Keller is a graduate student working with the University of Alaska Museum of the North’s Patrick Druckenmiller, one of the researchers who has helped recover the bones of hadrosaurs and other dinosaurs from bluffs of the Colville River in northern Alaska. —Ned Rozell | Alaska Science, Anchorage Daily News, 25 Feb. 2023

On the basis of the new information, researchers now estimate that this hadrosaur could have run roughly 27 miles per hour. —Megan Talkington, Discover Magazine, 6 Feb. 2010

Word History

Etymology

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

First Known Use

1877, in the meaning defined above