superioress
/s(j)uːˌpɪərɪəˈrɛs/ /s(j)ʊˌpɪərɪəˈrɛs/ /s(j)uːˈpɪərɪərɪs/noun
1The head of a convent or a female religious community; a Mother Superior.
2 Superioress General. A superioress who leads the superioresses in an order.
Origin
Mid 17th century; earliest use found in Abraham Woodhead (1609–1678), Roman Catholic controversialist. From superior + -ess.