Of or relating to the measurement of rainfall; relating to or obtained by means of a pluviometer.
pluviometric coefficientnoun the ratio of the mean daily rainfall of a particular month to that of the whole year..
Origin
Mid 19th century; earliest use found in George Perkins Marsh (1801–1882). From classical Latin pluvia rain + -o- + -metric, after pluviometer. Compare French pluviométrique, Italian pluviometrico.