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hard water

DEFINITIONS OF: hard water

1

n water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap

Antonyms:
soft water
water that is not hard (does not contain mineral salts that interfere with the formation of lather with soap)
Type of:
H2O, water
binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
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