from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A geocentric model of the solar system, described by the eponymous astronomer.
from the GNU version of the Collaborative International Dictionary of English
- adj. 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 This theory was received for ages, until superseded by the Copernican system.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (astronomy) Ptolemy's model of the universe with the Earth at the center
From Ptolemy ("a surname") + -ic + system. After Greek-Roman astronomer Claudius Ptolemy (c. 90 - c. 168 AD), who explained the theory in an influential work. (Wiktionary)