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Definition of Ptolemy
1. Noun. Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance.
Exact synonyms: Claudius Ptolemaeus
Generic synonyms: Astronomer, Stargazer, Uranologist
Derivative terms: Ptolemaic
Generic synonyms: Astronomer, Stargazer, Uranologist
Derivative terms: Ptolemaic
2. Noun. An ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra.