plural noun
Is·​chy·​ro·​my·​i·​dae | \ ˌiskə̇rōˈmīəˌdē\

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

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History and Etymology for Ischyromyidae

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

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