hadrosaur

noun had·ro·saur \ ˈha-drə-ˌsȯr \

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

Recent Examples of hadrosaur from the Web

Collectively, the sequences showed the purported hadrosaur collagen was more closely related to T. rex and birds than to modern reptiles.

— robert f. service, Science | AAAS, "‘I don’t care what they say about me’: Paleontologist stares down critics in her hunt for dinosaur proteins," 13 Sep. 2017
How to hunt proteins in dinosaur fossils Mary Schweitzer and her colleagues first remove minerals from fossils such as a hadrosaur femur, leaving organic material behind.

— robert f. service, Science | AAAS, "‘I don’t care what they say about me’: Paleontologist stares down critics in her hunt for dinosaur proteins," 13 Sep. 2017
Tyrannosaurs, hadrosaurs, ankylosaurs, ostrich mimic dinosaurs and more have turned up, but no horned dinosaurs.

— charles p. pierce, Esquire, "Nothing is Real in Trump's America Unless the Cameras Are Rolling," 23 June 2017
Tyrannosaurs, hadrosaurs, ankylosaurs, ostrich mimic dinosaurs and more have turned up, but no horned dinosaurs.

— charles p. pierce, Esquire, "Nothing is Real in Trump's America Unless the Cameras Are Rolling," 23 June 2017
Tyrannosaurs, hadrosaurs, ankylosaurs, ostrich mimic dinosaurs and more have turned up, but no horned dinosaurs.

— brian switek, Scientific American Blog Network, "When Horned Dinosaurs Traveled East," 19 June 2017
Tyrannosaurs, hadrosaurs, ankylosaurs, ostrich mimic dinosaurs and more have turned up, but no horned dinosaurs.

— charles p. pierce, Esquire, "Nothing is Real in Trump's America Unless the Cameras Are Rolling," 23 June 2017

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.