-trix Also -trice.
Forming feminine agent nouns.
[Latin suffix corresponding to masculine -tor.]
Though many words in this suffix have been created since the fifteenth century, few have been common; those few that do appear mostly now do so only in formal legal contexts: executrix (the female equivalent of executor), administratrix (of administrator), and testatrix (of testator). One that has come back into use in the latter part of the twentieth century after a long fallow period is dominatrix, a dominating woman who takes the sadistic role in sadomasochistic sexual activities. Other examples, now only historical, are aviatrix, a female aviator; editrix, a female editor; and proprietrix, a female proprietor. The spelling -trice is an alternative form, via French, now almost totally archaic. The plural of words in -trix is either -trices or -trixes.