/ Dictionary / Index N nitrogen balance: Meaning and Definition of Find definitions for: ni'trogen bal"ance Pronunciation: [key] — Biochem., Physiol. Biochem.,Physiol. the difference between the amount of nitrogen taken in and the amount excreted or lost: used to evaluate nutritional balance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nitrogenase nitrogen cycle Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language