/ Dictionary / Index G galactic equator: Meaning and Definition of Find definitions for: galac'tic equa'tor Pronunciation: [key] — Astron. Astron. the great circle on the celestial sphere that is equidistant from the galactic poles, being inclined approximately 62° to the celestial equator and lying about one degree north of the center line of the Milky Way. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. galactic coordinates galactic latitude Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language