English
hydrodimer
From hydro- + dimer.
Proto-Indo-European *wed- ‘water’
Proto-Indo-European *wódr̥ ‘water’
Proto-Hellenic *údōr ‘water’
Ancient Greek ῡ̆̔́δωρ ‘water’
English hydro-
Today it means
noun A dimer formed by means of hydrodimerization
Language periods are conventional ranges, not dates for this word.
Etymograph / hydrodimer