Definition of "auctor" []

• An obsolete form of author. (noun)

The Century Dictionary (Public Domain)

• "The Emperor Marcian in his first letter to Leo I declares that the success of the intended synod depends on his -- the pope's -- authorization, and Leo, not Marcian, is later called the auctor synodi without any restrictive qualification, especially at the time of the "Three Chapters" dispute, where the extension of the synod's authority was called in question."
• "Mauris libero nibh, auctor quis volutpat et, interdum ac leo."
• "Rector humani generis et auctor, nobis aeternum tribue benigne scandere caelum."