Metonic cycle

noun
Me·​ton·​ic cycle | \ meˈtänik- \

Definition of Metonic cycle

: a period of 19 years after the lapse of which the phases of the moon return to a particular date in the calendar year:
a : one of the 19-year periods reckoning from June 27, 432 b.c. that were used in determining lengths of years and the placing of the intercalary month in the ancient Greek calendar
b : one of the 19-year periods reckoning from 1 b.c. that are used in determining the date of Easter in the Gregorian calendar

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 Metonic cycle

Meton, 5th century b.c. Greek astronomer + English -ic

Keep scrolling for more

Learn More About Metonic cycle

Dictionary Entries Near Metonic cycle

metol

Metonic cycle

metonym

See More Nearby Entries 

Statistics for Metonic cycle

Cite this Entry

“Metonic cycle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Metonic%20cycle. Accessed 29 Jul. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

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!