quinquennium

play
noun quin·quen·ni·um \-nē-əm\

Definition of quinquennium

plural

quinquenniums

or

quinquennia

play \-nē-ə\
  1. :  a period of five years

Origin and Etymology of quinquennium

Latin, from quinque five + annus year — more at five, annual


First Known Use: 1621


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