/ Dictionary / Index F frontal gyrus: Meaning and Definition of Find definitions for: fron'tal gy'rus Pronunciation: [key] — Anat. Anat. any of several convolutions on the outer surface of the frontal lobe of the cerebrum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. frontal cyclone frontality 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