/ Dictionary / Index M meningococcus: Meaning and Definition of Find definitions for: me•nin•go•coc•cus Pronunciation: (mu-ning"gō-kok'us), [key] — pl. -coc•ci a reniform or spherical bacterium, Neisseria meningitidis, that causes cerebrospinal meningitis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. meningocele Menippe Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language