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sodium silicate

noun Chemistry.
  1. any of several clear, white, or greenish water-soluble compounds of formulas varying in ratio from Na2O⋅3.75SiO2 to 2Na2O⋅SiO2: used chiefly in dyeing, printing, and fireproofing textiles and in the manufacture of paper products and cement.
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Also called liquid glass, water glass.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for liquid glass

sodium silicate

noun
  1. Also called: soluble glass a substance having the general formula, Na 2 O. x SiO 2, where x varies between 3 and 5, existing as an amorphous powder or present in a usually viscous aqueous solutionSee water glass (def. 1)
  2. any sodium salt of orthosilicic acid or metasilicic acid
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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