artificial
ar·ti·fi·cial
 /ˌɑɚtəˈfıʃl̩/  adj  
  1 : not natural or real : made, produced, or done to seem like something natural
   artificial lighting/plants
   the world's first artificial heart
   This product contains no artificial colors/flavors/sweeteners–only natural substances are used.
  2 : not happening or existing naturally : created or caused by people
   artificial price inflation
   The country's borders are artificial, and were set with no consideration for the various ethnic groups in the region.
  3 [more ~; most ~] : not sincere
   an artificial smile
   Her concern seemed a bit artificial. [=forced]
  ar·ti·fi·ci·al·i·ty /ˌɑɚtəˌfıʃiˈæləti/  noun   [  noncount  ]
   the artificiality of his manner/smile
  ar·ti·fi·cial·ly  adv  
   artificially flavored/colored
   The building is artificially lit.