Ptolemaic system Meaning, Definition & Usage

  1. noun (astronomy) Ptolemy's model of the universe with the Earth at the center

WordNet

Definitions
  1. (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 This theory was received for ages, until superseded by the Copernican system.

Webster 1913