The Collaborative International Dictionary of English v.0.48:

Photogenic \Pho`to*gen"ic\, a.
   1. Of or pertaining to photogeny; producing or generating
      light.
      [1913 Webster]

   2. Appearing attractive in a photograph; having features that
      appear attractive in a photograph.
      [PJC]

   3. (Med.) Caused by light, as for example a skin abnormality.
      [PJC]

WordNet (r) 3.0 (2006):

photogenic
    adj 1: looking attractive in photographs

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "photogenic":
   3-D, autoluminescent, bioluminescent, chemicoluminescent,
   chemiluminescent, electroluminescent, fluorescent, luminal,
   luminescent, noctilucent, panchromatic, phosphorescent, photo,
   photoactive, photographic, photosensitive, radioluminescent,
   self-luminescent, self-luminous, telephoto, telephotographic,
   thermoluminescent, three-dimensional, tintype, tribofluorescent,
   triboluminescent, tribophosphorescent