/ Dictionary / Index S sodium arsenite: Meaning and Definition of Find definitions for: so'dium ar'senite Pronunciation: [key] — Chem. Chem. a white or grayish-white, water-soluble, poisonous powder, NaAsO, used chiefly in arsenical soaps for hides, as an insecticide, and as a weed-killer. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sodium ammonium phosphate sodium benzoate Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language