hard water

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Related to hard water: water softener

hard wa·ter

water containing ions, such as Mg²⁺ and Ca²⁺, that form insoluble salts with fatty acids so that ordinary soap will not lather in it.

Farlex Partner Medical Dictionary © Farlex 2012

Water with a high content of calcium and magnesium salts—e.g., carbonates and sulphates—which may interfere with certain lab tests

hard water

Water with a high content of calcium and magnesium salts–eg, carbonates and sulfates, which may interfere with certain lab tests. See Mineral water, Spring water; Cf Soft water.

hard wa·ter

(hahrd wawtĕr)

That containing ions, such as Mg²⁺ and Ca²⁺, which form insoluble salts with fatty acids so that ordinary soap will not lather in it.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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