hemihydrate

noun hemi·hy·drate \-ˈhī-ˌdrāt\

Definition of HEMIHYDRATE

: a hydrate (as plaster of paris) containing half a mole of water to one mole of the compound forming the hydrate

— hemi·hy·drat·ed \-ˌdrā-təd\ adjective

circa 1901

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