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Definition of: hydrate
(hī′drāt) noun Chem.
Any of a class of compounds formed by the union of molecules of water with other molecules or atoms.
—v.t. ·drat·ed, ·drat·ing To combine with water or its elements to form a hydrate. [<HYDR- + -ATE3]
—hy′drat·ed adjective
—hy·dra·tion (hī·drā′shən) noun
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