Definition of Ischyromyidae
: a family of primitive extinct sciuromorph rodents widely distributed in the northern hemisphere from the Lower Eocene to the Upper Oligocene, distantly related to the mountain beaver, and distinguished by low-crowned generalized cheek teeth
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 ischyromyidae
New Latin, from Ischyromys, type genus (from Greek ischyros strong + mys mouse) + -idae; akin to Greek echein to have, hold
Seen and Heard
What made you want to look up Ischyromyidae? Please tell us where you read or heard it (including the quote, if possible).