/ Dictionary / Index G gyromagnetic ratio: Meaning and Definition of Find definitions for: gy'romagnet'ic ra'tio Pronunciation: [key] — Physics. Physics. the ratio of the magnetic moment of a rotating charged particle to its angular momentum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gyromagnetic gyron Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language