/ Dictionary / Index S sulfanilyl: Meaning and Definition of Find definitions for: sul•fan•i•lyl Pronunciation: (sul-fan'u-lil), [key] — adj. Chem. containing the sulfanilyl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sulfanilic acid sulfanilyl group Related Content Daily Word Quiz: abyss Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language