Metonic cycle

noun Me·ton·ic cycle \meˈtänik-\

Definition of Metonic cycle

  1. :  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

There's more!

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!
Already a subscriber? Log in.

Origin and Etymology of metonic cycle

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


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

sad or melancholy

Get Word of the Day daily email!

Love words? Need even more definitions?

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