Source : Webster's Revised Unabridged Dictionary (1913)

Noetic \No*et"ic\, Noetical \No*et"ic*al\, a. [Gr. ?, fr. ? to
   perceive, ? mind, intellect.]
   Of or pertaining to the intellect; intellectual.

         I would employ the word noetic to express all those
         cognitions which originate in the mind itself. --Sir W.
                                                  Hamilton.