/ Dictionary / Index F folacin: Meaning and Definition of Find definitions for: fol•a•cin Pronunciation: (fol'u-sin), [key] — n. Biochem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: folacin (Thesaurus) fol. fold Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language