centennium

English

Etymology

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

Noun

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

• quincentennium

Latin

Etymology

Etymology tree

Latin centennis

Proto-Indo-European *-yós

Proto-Italic *-ios

Old Latin -ios

Latin -ius

Latin -ium

Latin centennium

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

Noun

centennium n (genitive centenniī or centennī); second declension

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

Declension

Second-declension noun (neuter).

	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

• → English: centennium, centennial