/ Dictionary / Index A ammoni-: Meaning and Definition of Find definitions for: ammoni- Pronunciation: [key] var. ofesp. before a vowel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ammonate ammonia Related Content Daily Word Quiz: diurnal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language