Source : Webster's Revised Unabridged Dictionary (1913)

Professorial \Pro`fes*so"ri*al\, a. [L. professorius: cf. F.
   professorial.]
   Of or pertaining to a professor; as, the professional chair;
   professional interest.

Source : WordNet®

professorial
     adj : relating to or characteristic of professors; "professorial
           demeanor"