sodomy (n.)

c. 1300, "unnatural sexual relations," such as those imputed to the inhabitants of Biblical Sodom, especially between persons of the same sex but also with beasts, from Old French sodomie, from Late Latin peccatum Sodomiticum "anal sex," literally "the sin of Sodom," from Latin Sodoma. In Middle English also synne Sodomyke (early 14c.).