polygyny
noun [ U ] uk/pəˈlɪdʒ.ɪ.ni/ us/pəˈlɪdʒ.ɪ.ni/
social science specialized一夫多妻（制）
the practice of having more than one wife or permanent female sexual partner at the same time
biology specialized（动物）一雄多雌
the practice of a male animal having more than one female mate (= sexual partner)
Compare: polyandry
See also: polygamy