/ Dictionary / Index N neisseria: Meaning and Definition of Find definitions for: neis•se•ri•a Pronunciation: (nī-sēr'ē-u), [key] — pl. -se•ri•ae any of several spherical bacteria of the genus Neisseria, certain species of which, as N. gonorrhoeae, are pathogenic for humans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Neisse neither Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language