pluviometer
noun
plu·vi·om·e·ter
ˌplüvēˈämətə(r)
variants or less commonly pluviameter
-ˈam-
: rain gage
Word History
Etymology
pluviometer probably from French pluviomètre, from pluvi- + -mètre -meter; pluviameter alteration (influenced by Latin pluvia rain) of pluviometer