Profestrix

Moreover, I introduced into the problem an additional element by requesting their reaction to the word profestrix, […] Mr. John Sparrow, formerly Warden of All Souls’ College, Oxford, was very definite: “As for the retired female professor, I am sure she can’t be called profestrix emerita: profestrix simply won’t do! (Indeed I know it wasn’t meant seriously). ” “I don’t trust profestrix for a moment,” wrote Dr. Frank Stubbings, formerly Orator in the University of Cambridge.

Of course "profestrix", [re]constructed on the antique model, would be right for the old verb. In fact, it is quite frequently used nowadays, esp. by profestrices of Latin, as in: [links] and a lot of others.

Actually, she was a profestrix emerita.

Profestrix emerita Grethe R. Hasle is responsible for the diatom section of the book, senior scientist Karl Tangen for the dinoflagellate part, and professor (now emeritus) Jahn Throndsen is responsible for the other groups and the general part as well as being the editor of the book.

If we were to mark the gender of a female professor, she should properly be referred to as profestrix. A retired female professor would then be referred to as a «profestrix emerita», Torp claimed. However, neither «profestrix» nor «profestrix emerita» have been widely used […]

A retired classics prof from the University of Lampeter called herself a Profestrix emerita when I was at Latin camp there, which was quite funny.

Important point. Latin demands congruence in grammatical gender, so "professor emerita" is ruled out. If the real sex of the individual is relevant the choice would be "profestrix emerita", but if not (usually the case) stick to "professor emeritus" for women and men alike.

Profestrix emerita surely ;-)