/ Dictionary / Index N nitr-: Meaning and Definition of Find definitions for: nitr- Pronunciation: [key] var. ofbefore a vowel: nitramine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nitpicker Nitralloy Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language