phytoestrogen UK /ˌfaɪ.təʊˈiː.stɹəd͡ʒ.ən/US /ˌfaɪ.toʊˈɛ.stɹəd͡ʒ.ən/ noun1 •A substance found in certain plants (such as genistein) which can produce effects like that of the hormone estrogen when ingested into the body. formsphytoestrogens
