English

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Etymology

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From Late Latin centennium (period of 100 years), from centennis (100-year) + -ium (forming abstract nouns). Cognate with centennial.

Noun

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centennium (plural centennia)

  1. (rare) Synonym of century: A period of 100 years.
    Coordinate terms: annum, biennium, triennium, quadrennium, quinquennium, sexennium, septennium, octennium, novennium, decennium, vicennium, tricennium, quincentennium, millennium, decamillennium, centimillennium, millionennium

Derived terms

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Latin

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Etymology

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From centennis (100-year) +‎ -ium (forming abstract nouns).

Noun

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centennium n (genitive centenniī or centennī); second declension

  1. (Late Latin) century: a period of 100 years

Declension

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Second-declension noun (neuter).

Case Singular Plural
Nominative centennium centennia
Genitive centenniī
centennī1
centenniōrum
Dative centenniō centenniīs
Accusative centennium centennia
Ablative centenniō centenniīs
Vocative centennium centennia

1Found in older Latin (until the Augustan Age).

Descendants

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  • English: centennium, centennial