noundŭŏdenniumDVODENNIVM☆ KeepMeaningthe space of twelve yearsLewis & Short 1879ModernAs printed, 1879DUODENNIUMLEWIS & SHORTDUODENNIUMdŭŏdennium, ii, n., I. the space of twelve years, Mythogr. Vat. 3, p. 163 med. (al. duodecennium).Read the whole entry