/ Dictionary / Index G gyroidal: Meaning and Definition of Find definitions for: gy•roi•dal Pronunciation: ( jī-roid'l), [key] — adj. having a spiral arrangement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gyro horizon gyromagnetic Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language