What does "cyclical" mean?

Cyclical: Of or pertaining to a cycle or circle; moving in cycles; as, cyclical time. Coleridge. Cyclic chorus, the chorus which performed the songs and dances of the dithyrambic odes at Athens, dancing round the altar of Bacchus in a circle. -- Cyclic poets, certain epic poets who followed Homer, and wrote merely on the Trojan war and its heroes; -- so called because keeping within the circle of a singe subject. Also, any series or coterie of poets writing on one subject. Milman.