TESTATRIX Meaning of TESTATRIX in English [ tɛ'steɪtrɪks ]■ noun ( plural testatrices -trɪsi:z or ~es ) Law a female testator.OriginC16: from late L., feminine of testator (see testator ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004