Definition of water mouse in English:

water mouse

noun

  • Any of various semiaquatic and chiefly tropical rodents of the family Muridae, especially of the Australasian genera Hydromys and Xeromys and the Central American genus Rheomys.

Origin

Late Middle English (in an earlier sense). From water + mouse.

Pronunciation

water mouse

/ˈwɔːtə ˌmaʊs/