English
heptahydrateheptahydrate
From hepta- + hydrate.
A compound of hepta- + hydrate
Proto-Indo-European *septḿ̥ ‘seven’
Proto-Hellenic *heptə́ ‘seven’
Ancient Greek ἑπτά ‘seven’
English hepta-
Proto-Indo-European *wed- ‘water’
Proto-Indo-European *wódr̥ ‘water’
Proto-Hellenic *údōr ‘water’
Ancient Greek ῡ̆̔́δωρ ‘water’
French hydrate
English hydrate
Today it means
noun A hydrate whose solid contains seven molecules of water of crystallization per molecule, or per unit cell
Language periods are conventional ranges, not dates for this word.
Etymograph / heptahydrate
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