- name of a Macedonian dynasty of Egypt founded by Ptolemy I and ruling from 323 to 30
- pl. Ptolemies a member of this dynasty
- (L. name Claudius Ptolomaeus) 2d cent. ; Alexandrian astronomer, mathematician, & geographer
- 367?-283 ; general of Alexander the Great: 1st king of the Ptolemaic dynasty (323-285): called Ptolemy Soter (“Savior”)
- 309-246 ; king of Egypt (285-246): son of Ptolemy I: called Ptolemy Philadelphus
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fl. second century A.D.
Ptolemy - Cultural Definition
An ancient Greek astronomer, living in Egypt (see also Egypt), who proposed a way of calculating the movements of the planets on the assumption that they, along with the sun and the stars, were embedded in clear spheres that revolved around the Earth. The system of Ptolemy, called the Ptolemaic universe, prevailed in astronomy for nearly fifteen hundred years, until the modern model of the solar system, with the sun at the center and the planets in motion, was developed from the ideas of Copernicus.
ptolemy - Science Definition
90?-168 CE.See Note at Copernicus.
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