/ Dictionary / Index F fistulous: Meaning and Definition of Find definitions for: fis•tu•lous Pronunciation: (fis'choo-lus), [key] — adj. pertaining to or resembling a fistula. tubelike; tubular. containing tubes or tubelike parts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fistulous (Thesaurus) fistulize fit Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language