/ Dictionary / Index A Ammianus: Meaning and Definition of Find definitions for: Am•mi•a•nus Pronunciation: (am"ē-ā'nus), [key] — n. a.d. c325–c398, Roman historian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ammeter ammine Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language