1. Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance; [syn: Ptolemy, Claudius Ptolemaeus]
WordNet (r) 3.0 (2006):
Claudius Ptolemaeus
n 1: Alexandrian astronomer (of the 2nd century) who proposed a
geocentric system of astronomy that was undisputed until
the late Renaissance [syn: Ptolemy, Claudius
Ptolemaeus]