/ Dictionary / Index D DMSO: Meaning and Definition of Find definitions for: DMSO Pronunciation: [key] dimethyl sulfoxide: a liquid substance, CHOS, used in industry as a solvent and paint and varnish remover; proposed as an analgesic and anti-inflammatory in musculoskeletal disorders. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. D.M.S. DMT Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language