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decennium

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noun de·cen·ni·um \-nē-əm\

Definition of decennium

plural decenniums or -nia \-nē-ə\

  1. :  a period of 10 years :  decade



Origin of decennium

Latin, from decem + annus year — more at annual


First Known Use: 1685

Rhymes with decennium


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