hemihydrate(redirected from hemihydrates)
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A hydrate in which the molecular ratio of water molecules to anhydrous compound is 1:2.
(Chemistry) chem a hydrate in which there are two molecules of substance to every molecule of water
hem•i•hy•drate(ˌhɛm ɪˈhaɪ dreɪt)
a hydrate in which there are two molecules of the compound for each molecule of water.