Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

duodecennial

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

Definition of duodecennial 

: occurring once in 12 years

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

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

Keep scrolling for more

Learn More about duodecennial

Share duodecennial

Dictionary Entries near duodecennial

duny

duo-

duo

duodecennial

duodecillion

duodecimal

duodecimo

Statistics for duodecennial

Look-up Popularity

Comments on duodecennial

What made you want to look up duodecennial? Please tell us where you read or heard it (including the quote, if possible).

Show Comments  Hide Comments 

WORD OF THE DAY

chapel

a private place of worship

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games