vicennium

From Latin vicennium, from vīcennis (“20-year”) + -ium, from vīciēs (“20 times”) + annus (“year”) + -is (suffix forming compound adjectives). Equivalent to vicennial +‎ -ium.

vicennium (plural vicennia or vicenniums)

1. (rare) A period of twenty years.

• k'atun

• annum (1 year), biennium (2), triennium (3), quadrennium (4), quinquennium (5), sexennium (6), septennium (7), octennium (8), novennium (9), decennium (10), tricennium (30), centennium (100), quincentennium (500), millennium (1000), decamillennium (10,000), centimillennium (100,000), millionennium (1,000,000)

• (Classical Latin) IPA^(key): [wiːˈkɛn.ni.ũː]
• (modern Italianate Ecclesiastical) IPA^(key): [viˈt͡ʃɛn.ni.um]

From vīcennis +‎ -ium (forming abstract nouns).

vīcennium n (genitive vīcenniī); second declension

1. (post-classical) vicennium, a twenty-year period
   • 493 CE – 526 CE, attributed to Flavius Theodericus, Edictum Theodorici Regis 68. Si originaria de ingenuo solo exierit:

     Originaria ex quo de ingenuo solo discesserit, intra vicennii spatia repetatur. Quod si originaria, expletis viginti annis, domino sub hac praescriptione perierit, simul eius agnatio, intra viginti annos suscepta a domino mulieris servato novellae legis tenore non pereat.

     (please add an English translation of this quotation)

Second-declension noun (neuter).

• English: vicennium
• Italian: vicennio

vīcennium

1. genitive masculine/feminine/neuter plural of vīcennis

• “vicennium”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “vicennium”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.