/ Dictionary / Index A Ariminum: Meaning and Definition of Find definitions for: A•rim•i•num Pronunciation: (u-rim'u-num), [key] — n. ancient name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Arimathaea Arion Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language