Source : Webster's Revised Unabridged Dictionary (1913)

AEsthetic \[AE]s*thet"ic\, AEsthetical \[AE]s*thet"ic*al\,a.
   Of or Pertaining to [ae]sthetics; versed in [ae]sthetics; as,
   [ae]sthetic studies, emotions, ideas, persons, etc. --
   {[AE]s*thet"ic*al*ly}, adv.

Source : WordNet®

aesthetical
     adj : concerning or characterized by an appreciation of beauty or
           good taste; "the aesthetic faculties"; "an aesthetic
           person"; "aesthetic feeling"; "the illustrations made
           the book an aesthetic success" [syn: {aesthetic}, {esthetic},
            {esthetical}] [ant: {inaesthetic}]