/ Dictionary / Index G geomagnetic: Meaning and Definition of Find definitions for: ge•o•mag•net•ic Pronunciation: ( jē"ō-mag-net'ik), [key] — adj. of or pertaining to geomagnetism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. geom. geomagnetic storm Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language