esthetics
  美學
  Æs·thet·ics, Es·thet·ics, n.  The theory or philosophy of taste; the science of the beautiful in nature and art; esp. that which treats of the expression and embodiment of beauty by art.
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  Es·thete n.; Es·thet·ic a., Es·thet·ic·al a., Es·thet·ics n. etc. Same as æsthete, æsthetic, æsthetical, æsthetics, etc.
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  esthetics
       n : (art) the branch of philosophy dealing with beauty and taste
           (emphasizing the evaluative criteria that are applied to
           art); "traditional aesthetics assumed the existence of
           universal and timeless criteria of artistic value" [syn:
           aesthetics]