geometry n.

Earth as a goddess, from Greek Gaia, spouse of Uranus, mother of the Titans, personification of gaia "earth" (as opposed to heaven), "land" (as opposed to sea), "a land, country, soil;" it is a collateral form of gē (Dorian ga) "earth," which is of unknown origin and perhaps from a pre-Indo-European language of Greece. The Roman equivalent goddess of the earth was Tellus (see tellurian), sometimes used in English poetically or rhetorically for "Earth personified" or "the Earth as a planet."

word-forming element meaning "process of measuring," Middle English -metrie, from French -metrie, from Latin -metria, from Greek -metria "a measuring of," from -metros "measurer of," from metron "measure," from PIE root *me- (2) "to measure."