mo·​sa·​saur | \ ˈmō-zə-ˌsȯr How to pronounce mosasaur (audio) \

Definition of mosasaur

: any of a family (Mosasauridae) of very large extinct marine fish-eating lizards of the Upper Cretaceous with limbs modified into paddles that are related to the recent monitor lizards

Examples of mosasaur in a Sentence

Recent Examples on the Web Bailey and other fossils are much more likely to find a tooth or even a fragment of jawbone from a mosasaur as happened on one of the excursions in early July. Dennis Pillion |, al, 5 Aug. 2021 Researchers have discovered a new species of mosasaur, a terrifying prehistoric reptile that lived during the age of dinosaurs, in Morocco. Chris Ciaccia, Fox News, 8 Oct. 2020 Paleontologists don’t know for sure the egg came from a mosasaur. Alex Fox, Smithsonian Magazine, 22 June 2020 The second discovery is another soft-shelled egg that researchers have attributed to a kind of giant marine reptile called a mosasaur. Alex Fox, Smithsonian Magazine, 22 June 2020 The bones of a mosasaur were found less than 700 feet from the site, suggesting the egg may have belonged to these 20-foot-long swimming reptiles. Michael Greshko, National Geographic, 17 June 2020 Turns out, the fossil was a soft-shell egg — the largest-ever discovered — possibly laid by a massive marine reptile known as the mosasaur. Joshua Bote, USA TODAY, 19 June 2020 Based on an analysis of 259 modern reptiles and their eggs, an ancient beast known as a mosasaur would seem to match description, according to SWNS. Fox News, 18 June 2020 The oceans were still dominated by other marine animals like sharks, rays, and aquatic reptiles like mosasaurs. Sara Kiley Watson, Popular Science, 14 May 2020

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

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First Known Use of mosasaur

1841, in the meaning defined above

History and Etymology for mosasaur

New Latin Mosasaurus, from Latin Mosa the river Meuse + Greek sauros lizard

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The first known use of mosasaur was in 1841

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Cite this Entry

“Mosasaur.” Dictionary, Merriam-Webster, Accessed 24 Oct. 2021.

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