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Hydrate

(Science: chemistry) a compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts.

a substance which does not contain water as such, but has its constituents (hydrogen, oxygen, hydroxyl) so arranged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime.

Origin: gr. ydwr water: cf. F. Hydrate.