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decennium

Pronunciation: /dɪˈsɛnɪəm/

Definition of decennium

noun (plural decennia /-nɪə/ or decenniums)

rare
  • a decade.

Origin:

late 17th century: from Latin, from decem 'ten' + annus 'year'

decennium in other Oxford dictionaries

Definition of decennium in the US English dictionary

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