Sof"ten*er (?), n.

One who, or that which, softens.

[Written also, less properly, softner.]

<-- Water softener, a device which exchanges sodium ions for polyvalent metal cations in water, thus converting the "hard" mineral-containing water into "soft" water. This treatment renders the water more usable for washing, as the polyvalent cations interfere with the detergent action of soaps. -->


© Webster 1913.

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