/ Dictionary / Index F frontal cyclone: Meaning and Definition of Find definitions for: fron'tal cy'clone Pronunciation: [key] any extratropical cyclone associated with a front: the most common cyclonic storm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. frontal bone frontal gyrus Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language