bioflavonoid noun bio??fla??vo??noid \??b??-??-??fl??-v??-??no??id\ (Medical Dictionary)Medical Definition of BIOFLAVONOID : any of various biologically active flavonoids (as hesperidin and quercetin) derived from plants and found especially in fruits and vegetables (as grapes, citrus fruits, and peppers) Learn More About BIOFLAVONOID SCRABBLE??: Playable words you can make from bioflavonoidBrow