/ Dictionary / Index H hippocampal gyrus: Meaning and Definition of Find definitions for: hip'pocam'pal gy'rus Pronunciation: [key] — Anat. Anat. a convolution on the inner surface of the temporal lobe of the cerebrum, bordering the hippocampus. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hippocampal hippocampus Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language