al·​lo·​saur ˈa-lə-ˌsȯr How to pronounce allosaur (audio)
: any of a family (Allosauridae) of large theropod dinosaurs usually having three clawed digits on each arm and leg and living from the Late Jurassic to the early Cretaceous period
especially : allosaurus

Examples of allosaur in a Sentence

Recent Examples on the Web That right time began about 100 million years ago, when a period of intense volcanic activity caused a mini-mass extinction in the Northern Hemisphere, killing many of the larger dinosaurs, including allosaurs, the apex predators of their day. Eric Betz, Discover Magazine, 12 Apr. 2019 There's some evidence that tyrannosaurs may have been faster and more agile than other groups of large predatory dinosaurs, such as the earlier allosaurs. Michael Greshko, National Geographic, 26 Mar. 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'allosaur.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1934, in the meaning defined above

Time Traveler
The first known use of allosaur was circa 1934

Dictionary Entries Near allosaur

Cite this Entry

“Allosaur.” Dictionary, Merriam-Webster, Accessed 16 Apr. 2024.

More from Merriam-Webster on allosaur

Love words? Need even more definitions?

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