mosasaur

noun
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

The study documents some fragmentary marine fossils, including the teeth of ancient sharks, aquatic reptiles called mosasaurs, and an extinct type of mollusk called an ammonite. Michael Greshko, National Geographic, "These fossils may capture the day the dinosaurs died. Here's what you should know.," 31 Mar. 2019 In the latter, the absurdly gigantic mosasaur (which technically wasn’t even a dinosaur) snacking on great white sharks didn’t grow longer than about 50 feet from head to tail. Katherine J. Wu, Smithsonian, "Five Ways Real Science Would Make the New Jurassic World So Much Better," 12 June 2018 Existing in a warm, shallow seaway between today’s Rocky and Appalachian mountains, plesiosaurs lived alongside mosasaurs, the apex predator of their day, resembling a type of watery Komodo dragon. Jack Dura, The Seattle Times, "80 million-year-old remains prepped for North Dakota display," 15 Jan. 2018 The plesiosaur to be displayed will be positioned by a mosasaur specimen. Jack Dura, The Seattle Times, "80 million-year-old remains prepped for North Dakota display," 15 Jan. 2018 But big things in the ocean, like mosasaurs, which weren’t actually dinosaurs, all go extinct. Mike Hettwer, National Geographic, "Why T. Rex's Puny Arms Are a Sign of Strength," 30 Sep. 2017 At Pembina Gorge (Aug. 8 to 12), volunteers can dig up sea life from 80 million years ago, like giant squid and mosasaurs (marine reptiles). Hillary Richard, New York Times, "When Dinosaurs Roamed North Dakota," 11 July 2017 The mosasaur’s skull sat in the prep lab of the New Jersey State Museum. Brian Switek, WIRED, "Mosasaur Bites and Limpet Scrapes," 11 Apr. 2012

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.

See More

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

Keep scrolling for more

Learn More about mosasaur

Dictionary Entries near mosasaur

mosaist

Mosan

mosandrite

mosasaur

Mosasauria

mosasaurian

Mosasaurus

Statistics for mosasaur

Last Updated

3 Jul 2019

Look-up Popularity

Time Traveler for mosasaur

The first known use of mosasaur was in 1841

See more words from the same year

More from Merriam-Webster on mosasaur

Britannica.com: Encyclopedia article about mosasaur

Comments on mosasaur

What made you want to look up mosasaur? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a haphazard or makeshift solution

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!