: a colorless, crystalline, bioactive ketone C15H10O2also: any of various usually hydroxyl derivatives of isoflavone (such as genistein and daidzein) that are plant compounds possessing antioxidant and estrogenic activity in the body
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: a bioactive ketone C15H10O2 noted for its numerous derivatives that are found in plants (as the soybean) and have antioxidant and estrogenic activityalso: any of these derivatives (as daidzein or genistein)