The Collaborative International Dictionary of English v.0.48:

Inquisitional \In`qui*si"tion*al\, a. [LL. inquisitionalis.]
   Relating to inquiry or inquisition; inquisitorial; also, of
   or pertaining to, or characteristic of, the Inquisition.
   [1913 Webster]

         All the inquisitional rigor . . . executed upon books.
                                                  --Milton.
   [1913 Webster]