English
floodometer
From flood + -o- + -meter.
Formed from flood + -o- + -meter
Proto-Indo-European *pleh₃(w)- ‘to swim, flow’
Proto-Germanic *flōduz ‘river’
Proto-West Germanic *flōdu ‘river’
Old English flōd ‘flowing of the tide’
Middle English flod ‘a river; a waterbody that moves in one direction’
English flood
Today it means
noun An instrument for measuring the height of floodwater.
Language periods are conventional ranges, not dates for this word.
Etymograph / floodometer