decennium

noun
de·cen·ni·um | \ -nē-əm \
plural decenniums or decennia\-nē-ə \

Definition of decennium 

: a period of 10 years : decade

First Known Use of decennium

1685, in the meaning defined above

History and Etymology for decennium

Latin, from decem + annus year — more at annual

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Dictionary Entries near decennium

decennary

decenniad

decennial

decennium

decent

decenter

decentness

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Time Traveler for decennium

The first known use of decennium was in 1685

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