duodecennial

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

Definition of duodecennial 

: occurring once in 12 years

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History and Etymology for 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

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Dictionary Entries near duodecennial

duny

duo-

duo

duodecennial

duodecillion

duodecimal

duodecimo

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