/ Dictionary / Index S sulfapyridine: Meaning and Definition of Find definitions for: sul•fa•pyr•i•dine Pronunciation: (sul"fu-pir'i-dēn", -din), [key] — n. Pharm. a sulfanilamide derivative, CHNOS, formerly used for infections caused by pneumococci, now used primarily for a particular dermatitis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sulfapyridine (Thesaurus) sulfantimonide sulfarsenide Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language