The Collaborative International Dictionary
Administratrix
Administratrix \Ad*min`is*tra"trix\, n. [NL.] A woman who administers; esp., one who administers the estate of an intestate, or to whom letters of administration have been granted; a female administrator.
Wiktionary
administratrix
n. A female administrator.
Usage examples of "administratrix".
He sees Cory's face has taken on her Administratrix frown: such things should not occur in her hostel.