the Ptolemaic system

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• Ptolemaic System — (Source: [http://en.wikipedia.org/wiki/Geocentric model| Geocentric Model] )In the Ptolemaic system, each planet is moved by five or more spheres: one sphere is its deferent. The deferent was a circle centered around a point halfway between the …   Wikipedia

• Ptolemaic system — Astron. 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. [1765 75] * * * ▪ astronomy       mathematical model of the… …   Universalium

• Ptolemaic system — Ptolemaic Ptol e*ma ic, a. Of or pertaining to Ptolemy, the geographer and astronomer. [1913 Webster] {Ptolemaic system} (Astron.), the system maintained by Ptolemy, who supposed the earth to be fixed in the center of the universe, with the sun… …   The Collaborative International Dictionary of English

• Ptolemaic system — (also Ptolemaic theory) ► NOUN ▪ the formerly held theory that the earth is the stationary centre of the universe …   English terms dictionary

• Ptolemaic system — n. the theory, systematized by Ptolemy, postulating the earth as the center or fixed point of the universe, around which the celestial bodies move …   English World dictionary

• Ptolemaic System —    The astronomical system associated with Ptolemy in which the stars circle round the earth which remains stationary …   Who’s Who in Christianity

• Ptolemaic system — noun (singular) the old system of belief that the Earth was at the centre of the universe, with the sun, stars and planets moving around it …   Longman dictionary of contemporary English

• Ptolemaic system — The dominant, geocentric system of astronomy before Copernicus . Ptolemy was an astronomer, mathematician, and geographer who flourished between AD 127 and 148 in Alexandria. His masterpiece is known by its Arabic title of the Almagest, a… …   Philosophy dictionary

• PTOLEMAIC SYSTEM —    the highly complex system of astronomy ascribed to Claudius Ptolemy, which assumed that the earth was the centre of a sphere which carried the heavenly bodies along in its daily revolution, accounted for the revolutions of the sun and moon by… …   The Nuttall Encyclopaedia

• Ptolemaic system — (also Ptolemaic theory) noun 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 …   English new terms dictionary

• Ptolemaic system — /tɒləˈmeɪɪk ˌsɪstəm/ (say toluh mayik .sistuhm) noun a system elaborated by Ptolemy and subsequently modified by others, according to which the earth was the fixed centre of the universe, with the heavenly bodies moving about it. Compare… …