Calgon

[ kal-gon ]
/ ˈkæl gɒn /

Trademark.

a brand of sodium phosphate glass (sodium hexametaphosphate), soluble in water: used as a water-softening agent.
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British Dictionary definitions for calgon

Calgon

/ (ˈkælɡɒn) /

noun

trademark a chemical compound, sodium hexametaphosphate, with water-softening properties, used in detergents
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012