/ Dictionary / Index G gyron: Meaning and Definition of Find definitions for: gy•ron Pronunciation: ( jī'run, -ron), [key] — n. Heraldry. a subordinary having the form of a triangle, usually equal to half a quarter of the escutcheon, with its apex at the fess point. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gyromagnetic ratio gyronny 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