/ Thesaurus / C Synonyms of claudius ptolemaeus Find synonyms for: Noun1. Ptolemy, Claudius Ptolemaeususage: Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late RenaissanceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: foliage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language