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quadrennium

Flag: gbEnglishOxford New American Dictionary
quadrennium /kwäˈdrenēəm, kwɑˈdrɛniəm /
▸ noun
(plural quadrennia /-ˈdrenēə/ or quadrenniums)
a specified period of four years.
– ORIGIN early 19th century : from Latin quadriennium, from quadri- ‘four’ + annus ‘year’.