\Ptol`e*ma"ic\, a.
Of or pertaining to Ptolemy, the geographer and astronomer.
{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 This theory was received for ages, until superseded by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.