adjective du·o·decennial \¦d(y)ü(ˌ)ō+\

Definition of duodecennial

  1. :  occurring once in 12 years

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Origin and Etymology of duodecennial

Late Latin duodecennium period of 12 years (from Latin duodecim twelve—from duo two + -decim, from decem ten—+ -ennium, from annus year) + English -al — more at two, ten, annual

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a trip made at another's expense

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