the branch of meteorology that deals with the distribution and mapping of the rainfall.
ΘΚΠ
the world > the earth > weather and the atmosphere > weather > study or science of weather > study or science of specific conditions or phenomena > [noun] > study of rainfall
ombrology1839
hyetography1849
1849 D. P. ThomsonIntrod. Meteorol. (L.) The rain-gauge..one of the most important instruments in hyetography.