administratrix
noun
ad·min·is·tra·trix əd-ˌmi-nə-ˈstrā-triks 
plural administratrices əd-ˌmi-nə-ˈstrā-trə-ˌsēz
: a woman who is an administrator especially of an estate
Word History
Etymology
borrowed from Medieval Latin administrātrīx, from Latin administrāre "to administer" + -trīx -trix
First Known Use
1561, in the meaning defined above
Legal Definition
administratrix
noun
ad·min·i·stra·trix əd-ˌmi-nə-ˈstrā-triks
plural administratrices -ˈstrā-trə-ˌsēz
: a woman administrator especially of an estate