(κύκλος a circle), in Chronology, a 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: any periodical space of time.

Cycle of Induction. See Calendar, vol. vi., p. 81; Chronology, vol. vi., p. 673.

Cycle of the Moon, called also the Golden Number, and the Metonic Cycle. See Calendar, vol. vi., p. 81.

Cycle of the Sun, or Solar Cycle. See Calendar, vol. vi., p. 80.