Definition of Ptolemaic system in English:

Ptolemaic system

Syllabification: Ptol·e·ma·ic sys·tem
(also Ptolemaic theory)


Astronomy , • historical
  • The theory that the earth is the stationary center of the universe, with the planets moving in epicyclic orbits within surrounding concentric spheres. Compare with Copernican system.
    More 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.

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Word of the day milord
Pronunciation: məˈlôrd
used to address an English nobleman