English
hyetology
From hyeto- + -logy.
Formed from hyeto- + -logy
Proto-Indo-European *sh₂ew- ‘to pour, scatter, rain’
Ancient Greek ῡ̔́ω ‘to rain’
Ancient Greek ὑετός ‘rain’
English hyeto-
Today it means
noun The scientific study of precipitation.
Language periods are conventional ranges, not dates for this word.
Etymograph / hyetology