from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A reversible chemical reaction between an insoluble solid and a solution during which ions may be interchanged, used in water softening and in the separation of radioactive isotopes.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the reversible process whereby ions are exchanged between a solution and a solid or gel; the process used in a water softener

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processing


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