xenoestrogenEnglishOxford New American Dictionaryxenoestrogen /ˌzēnōˈestrəjən, ˌzinoʊˈɛstrədʒən / ▸ noun Physiology any natural or synthetic compound introduced into the body that mimics the effects of estrogen or promotes its production. – ORIGIN 1990s : from xeno- + estrogen.