Source : Webster's Revised Unabridged Dictionary (1913)

Archidiaconal \Ar`chi*di*ac"o*nal\, a. [L. archidiaconus, Gr. ?,
   equiv. to E. archdeacon.]
   Of or pertaining to an archdeacon.

         This offense is liable to be censured in an
         archidiaconal visitation.                --Johnson.

Source : WordNet®

archidiaconal
     adj : of or relating to an archdeacon or his office