Muridae
noun plural
Mu·ri·dae
| \ ˈmyu̇r-ə-ˌdē
\
\
Medical Definition of Muridae
: a very large family of relatively small rodents (superfamily Muroidea) that include various originally Old World rodents (as the house mouse and the common rats) that are now cosmopolitan in distribution and that in recent classifications often include the cricetid rodents as a subfamily (Cricetinae)