ptolemaic
Definition
- Adjective:
- Relating to the geocentric astronomical system of Claudius Ptolemy: Describing the model of the universe that places Earth at the center, with the sun, moon, and planets revolving around it.
- Relating to the astronomer Ptolemy (Claudius Ptolemaeus): Pertaining to the ancient Greco-Roman mathematician, astronomer, and geographer.
Usage Examples
- Adjective:
- The ptolemaic model of the cosmos was dominant for over a millennium.
- He studied ptolemaic astronomy to understand historical scientific thought.
Advanced Usage
- "Ptolemaic system": The specific term for the Earth-centered cosmological model.
- The Copernican revolution eventually replaced the Ptolemaic system.
- "Ptolemaic dynasty": Refers to the Hellenistic dynasty that ruled Egypt from 305 to 30 BC, founded by Ptolemy I Soter. (Note: This is a distinct, related usage based on the name Ptolemy).
- Cleopatra VII was the last ruler of the Ptolemaic dynasty.
Variants and Related Words
- Ptolemaist (noun, historical): A supporter or adherent of the Ptolemaic system.
- Ptolemy (noun): The name of the astronomer and the rulers of the Hellenistic dynasty.
Synonyms
- Geocentric: Having or representing the earth as the center.
- The ptolemaic and geocentric views were once synonymous.
Related Phrases
- "Ptolemaic epicycle": A specific component of the Ptolemaic model, a small circle whose center moves around a larger circle (the deferent), used to explain planetary motion.
- The complex paths of planets were explained using Ptolemaic epicycles.
Adjective
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of or relating to the geocentric Ptolemaic system
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in the Ptolemaic system of planetary motion the earth is fixed as the center of the universe with the sun and moon and planets revolving around it
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of or relating to the astronomer Ptolemy
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