Cycle

(sīkl.) [From Gr. kyklos, a circle.] (Chron.) A certain period or series of numbers, which regularly proceed from the first to the last, and then return again to the first, and so circulate perpetually.- C. of the Sun, or Solar C., a period of 28 years, in which the same days of the week recur on the same days of the year, and the Sunday or Dominical Letter recurs in the same order. C. of the Moon, or Lunar C., a period of 19 years, in which the new and full moon recur on the same days of the month. See GOLDEN NUMBER, INDICTION, METONIC (and CALIPPIC) CYCLE. [s. 257]