The geocentric Ptolemaic system of astronomy. / (by extension) Any belief system or model that gives undue importance to the observer.

(historical) Of or pertaining to the Ptolemy dynasty of pharaohs, the Ptolemies, rulers of Hellenistic Egypt. / (astronomy) Of or pertaining to the astronomer Claudius Ptolemy.

Alternative form of Ptolemaic

(astronomy) A geocentric model of the solar system, described by the eponymous astronomer.