Englishfor English speakers
Ptolemy
—
noun
an ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra
—
noun
Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance
ix
—
adjective
(= nine)
denoting a quantity consisting of one more than eight and one less than ten
IX
—
noun
(= nine)
the cardinal number that is the sum of eight and one