The Collaborative International Dictionary of English v.0.48:

Ptolemaic \Ptol`e*ma"ic\, a.
   Of or pertaining to Ptolemy, the geographer and astronomer.
   [1913 Webster]

   Ptolemaic system (Astron.), the system maintained by
      Ptolemy, who supposed the earth to be fixed in the center
      of the universe, with the sun and stars revolving around
      it. This theory was received for ages, until superseded by
      the Copernican system.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Ptolemaic system
    n 1: (astronomy) Ptolemy's model of the universe with the Earth
         at the center