Mid 17th century. From classical Latin adiūtrīx female helper or accomplice, feminine form corresponding to adiūtor from adiūt-, past participial stem of adiūvāre to help + -trīx.
Definition of adjutrix in US English:
adjutrix
nounˈadʒʊtrɪks
rare
A female helper.
Origin
Mid 17th century. From classical Latin adiūtrīx female helper or accomplice, feminine form corresponding to adiūtor from adiūt-, past participial stem of adiūvāre to help + -trīx.