decennium


de·cen·ni·um

noun \-nē-əm\
plural de·cen·ni·ums or -nia \-nē-ə\

Definition of DECENNIUM

:  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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