Definition of Ptolemaic system in English:

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Ptolemaic system

Pronunciation: /tɒləˈmeɪɪksɪstəm/
(also Ptolemaic theory)


Astronomy , historical
The theory that the earth is the stationary centre of the universe, with the planets moving in epicyclic orbits within surrounding concentric spheres. Compare with Copernican system.
Example sentences
  • For many centuries, astronomers embraced the Ptolemaic theory: the Sun revolves around Earth.
  • The Ptolemaic theory of all the planets encircling the earth could now be disproved once and for all.
  • Suppose I decide that I believe the Ptolemaic system is more plausible than the Copernican system.

For editors and proofreaders

Line breaks: Ptol¦em|aic sys¦tem

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