/ Dictionary / Index N nitrogen narcosis: Meaning and Definition of Find definitions for: ni'trogen narco"sis Pronunciation: [key] — Pathol. Pathol. a semistupor, lightheadedness, or euphoria experienced by deep-sea divers when nitrogen from air enters the blood at higher than atmospheric pressure. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nitrogen mustard nitrogenous Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language