/ Dictionary / Index S sodium metasilicate: Meaning and Definition of Find definitions for: so'dium met•a•sil'i•cate Pronunciation: (met"u-sil'i-kit, -kāt"), [key] — Chem. Chem. a white, granular sodium silicate, NaSiO, soluble in water: used in detergents and in bleaching and cleaning products. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sodium meta-arsenite sodium methylate Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language