Definitions for water softener
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Random House Webster's College Dictionary
wa′ter sof`tener(n.)
any of a group of substances that when added to water containing calcium and magnesium ions cause the ions to precipitate or change their usual properties: used to purify water and increase its sudsing ability.
Category: Chemistry
Princeton's WordNet
water softener(noun)
a substance (such as sodium chloride) that lessens the hardness of water by replacing calcium and magnesium ions with sodium ions and so gives the water more efficient sudsing power
Wiktionary
water softener(Noun)
A device which reduces the calcium and magnesium concentration of hard water by passing it through an ion exchange resin.
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