/ Dictionary / Index S sestertium: Meaning and Definition of Find definitions for: ses•ter•ti•um Pronunciation: (se-stûr'shē-um, -shum), [key] — pl. -ti•a a money of account of ancient Rome, equal to 1000 sesterces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sesterce sestertius Related Content Daily Word Quiz: crockery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language