Medical Dictionary


noun hy·dra·tion \hī-ˈdrā-shən\

Medical Definition of HYDRATION

:  the act or process of combining or treating with water: as a :  the introduction of additional fluid into the body <hydration sometimes helps to reduce the concentration of toxic substances in the tissues> b :  a chemical reaction in which water takes part with the formation of only one product <hydration of ethylene to ethyl alcohol>; especially :  a reaction in which water takes part in the form of intact molecules
:  the quality or state of being hydrated; especially :  the condition of having adequate fluid in the body tissues
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