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sororate marriage is a type of marriage in which a husband engages in marriage or sexual relations with the sister of his wife, usually after the death of his wife or if his wife has proven infertile.
als "junior-sororat" bezeichnete der us-amerikanische anthropologe george p. murdock 1949 die bevorzugte oder vorgeschriebene heiratsverbindung eines witwers mit der "jüngeren" schwester seiner verstorbenen frau.