hard water definition

  • noun:
    • liquid with a top concentration of dissolved minerals, specially calcium, rendering it tough to lather with detergent.
    • See under Hard.
    • liquid that contains mineral salts (as calcium and magnesium ions) that reduce formation of lather with detergent
  • adjective:
    • liquid, containing lime or some mineral material rendering it unfit for washing. See Hardness, 3.

Related Sources

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