/ Dictionary / Index S sodium sulfide: Meaning and Definition of Find definitions for: so'dium sul'fide Pronunciation: [key] — Chem. Chem. a yellow or brick-red, crystalline, deliquescent, water-soluble solid, NaS, used chiefly in the manufacture of dyes, soaps, and rubber, as a depilatory for leather, and in the flotation of powdered lead and copper ores. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sodium sulfate sodium sulfite Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language