The Collaborative International Dictionary of English v.0.48:

AEsthete \[AE]s"thete\, n. [Gr. ? one who perceives.]
   One who makes much or overmuch of [ae]sthetics. [Recent]
   [1913 Webster] AEsthetic

WordNet (r) 3.0 (2006):

aesthete
    n 1: one who professes great sensitivity to the beauty of art
         and nature [syn: esthete, aesthete]