Calippic period
| a period of seventy-six years, proposed by Calippus, as an improvement on the Metonic cycle, since the 6940 days of the Metonic cycle exceeded 19 years by about a quarter of a day, and exceeded 235 lunations by something more. |
See also: Calippic
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.