1. Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance
   - Claudius Ptolemaeus
    
2. An ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra
   - Ptolemaic dynasty

Derived forms: Ptolemies

Type of: astronomer, dynasty, stargazer [informal], uranologist

Encyclopedia: Ptolemy, son of Dorymenes