/ Dictionary / Index C centenionalis: Meaning and Definition of Find definitions for: cen•ten•i•o•na•lis Pronunciation: (sen-ten"ē-ō-nā'lis), [key] — pl. -les a silver coin of ancient Rome, first issued by Diocletian as the 100th part of a solidus, later greatly debased. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. centenary centennial Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language