/ Dictionary / Index H hippocampus: Meaning and Definition of Find definitions for: hip•po•cam•pus Pronunciation: (hip"u-kam'pus), [key] — pl. -pi a sea horse with two forefeet, and a body ending in the tail of a dolphin or fish. an enfolding of cerebral cortex into the lateral fissure of a cerebral hemisphere, having the shape in cross section of a sea horse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hippocampus (Thesaurus) hippocampal gyrus hippocras 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