/ Dictionary / Index D dupondius: Meaning and Definition of Find definitions for: du•pon•di•us Pronunciation: (d-pon'dē-us, dy-), [key] — pl. -di•i a coin of ancient Rome, equal to two asses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. duplicity DuPont Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language