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.
Also called: soluble glassa 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)
any sodium salt of orthosilicic acid or metasilicic acid
