Ischyromyidae

plural noun

Is·​chy·​ro·​my·​i·​dae
ˌiskə̇rōˈmīəˌdē
: 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

Word History

Etymology

New Latin, from Ischyromys, type genus (from Greek ischyros strong + mys mouse) + -idae; akin to Greek echein to have, hold

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!

Dictionary Entries Near Ischyromyidae

Cite this Entry

“Ischyromyidae.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Ischyromyidae. Accessed 4 Dec. 2022.

Love words? Need even more definitions?

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


Challenging Words You Should Know

  • hedgehog reading a book
  • Often used to describe “the march of time,” what does inexorable mean?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ