society > society and the community > kinship or relationship > marriage or wedlock > remarriage > [adjective] > levirate or sororate
leviratical1849
levirate1865
sororatic1952
1952 M. N. SrinivasRelig. & Society among Coorgs of S. India v. 148 As sororatic unions are preferred among the Coorgs, a mother's younger sister steps into the mother's shoes in the event of the mother's death.