English
hydrogenetic
hydro- + genetic
Proto-Indo-European *wed- ‘water’
Proto-Indo-European *wódr̥ ‘water’
Proto-Hellenic *údōr ‘water’
Ancient Greek ῡ̆̔́δωρ ‘water’
English hydro-
Proto-Indo-European *ǵenh₁- ‘to beget’
…
Proto-Hellenic *gígnomai
Ancient Greek γίγνομαι ‘I come into being’
Ancient Greek γένεσις ‘origin, source’
English genesis
English genetic
Today it means
adj Precipitated directly from seawater.
Language periods are conventional ranges, not dates for this word.
Etymograph / hydrogenetic