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Ptolemaic system

noun, Astronomy.
a system elaborated by Ptolemy and subsequently modified by others, according to which the earth was the fixed center of the universe, with the heavenly bodies moving about it.
Origin of Ptolemaic system
First recorded in 1765-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for Ptolemaic system
Historical Examples
  • The theories in your books are almost as obsolete as the Ptolemaic system.

    Two on a Tower Thomas Hardy
British Dictionary definitions for Ptolemaic system

Ptolemaic system

the theory of planetary motion developed by Ptolemy from the hypotheses of earlier philosophers, stating that the earth lay at the centre of the universe with the sun, the moon, and the known planets revolving around it in complicated orbits. Beyond the largest of these orbits lay a sphere of fixed stars See also epicycle (sense 1) Compare Copernican system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Ptolemaic system in Science
Ptolemaic system

The astronomical system of Ptolemy, in which Earth is at the center of the universe and all celestial bodies revolve around it. The Sun, Moon, and planets revolve at different levels in circular orbits, and the stars lie in fixed locations on a sphere that revolves beyond these orbits. See more at epicycle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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