/ Dictionary / Index S sulfanilamide: Meaning and Definition of Find definitions for: sul•fa•nil•a•mide Pronunciation: (sul"fu-nil'u-mīd", -mid), [key] — n. Pharm. a white, crystalline amide of sulfanilic acid, CHNOS, formerly used in the treatment of bacterial infections: replaced by its derivatives and by antibiotics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sulfanilamide (Thesaurus) Sulfamylon sulfanilic acid Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language