Definition of Mesosaurus
: a genus of small aquatic presumably fish-eating Permian reptiles of South America and southern Africa
- Trending Now: More Trending:
- asylum insubordinate promulgate epochal clemency
- ALL
What's Trending Now
More Trending Words
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of mesosaurus
New Latin, from mes- + -saurus
Seen and Heard
What made you want to look up Mesosaurus? Please tell us where you read or heard it (including the quote, if possible).
