Source : Webster's Revised Unabridged Dictionary (1913)

Dianoetic \Di`a*no*et"ic\, a. [Gr. ?; dia` through + ? to
   revolve in the mind.] (Metaph.)
   Pertaining to the discursive faculty, its acts or products.

         I would employ . . . dianoetic to denote the operation
         of the discursive, elaborative, or comparative faculty.
                                                  --Sir W.
                                                  Hamilton.

Source : WordNet®

dianoetic
     adj : proceeding to a conclusion by reason or argument rather than
           intuition [syn: {discursive}]