/ Dictionary / Index L lactoflavin: Meaning and Definition of Find definitions for: lac•to•fla•vin Pronunciation: (lak"tō-flā'vin, lak'tō-flā"-), [key] — n. Biochem. riboflavin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lactoflavin (Thesaurus) lactoferrin lactogenic Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language