Noun
Metonic cycle (plural Metonic cycles)
(astronomy, calendar studies) A particular approximate common multiple of the tropical year and the synodic month; in other words, the 19-year period over which the lunar phases occur on the same dates.
According to the Metonic cycle, a lunar calendar begins on the same solar date every 19 years.
A Metonic cycle equates to 235 lunar months in each 19-year cycle. Source: Internet
Given the Tishrei molad of a certain year, the length of the year is determined as follows: First, one must determine whether each year is an ordinary or leap year by its position in the 19-year Metonic cycle. Source: Internet
Leap years The Jewish calendar is based on the Metonic cycle of 19 years, of which 12 are common (non-leap) years of 12 months and 7 are leap years of 13 months. Source: Internet
Meton 's cycle had an integer number of days, although Metonic cycle often means its use without an integer number of days. Source: Internet
The concert between the solar terms and the months, comply with the Metonic cycle in general. Source: Internet
The next approximation (arising from continued fractions) after the Metonic cycle (such as a 334-year cycle) is very sensitive to the values one adopts for the lunation (synodic month) and the year, especially the year. Source: Internet