revolving or recurring in cycles; characterized by recurrence in cycles.

of, pertaining to, or constituting a cycle or cycles.

Chemistry . of or pertaining to a compound that contains a closed chain or ring of atoms ( contrasted with acyclic ).

Botany .

arranged in whorls, as the parts of a flower.

(of a flower) having the parts so arranged.

Mathematics .

pertaining to an algebraic system in which all the elements of a group are powers of one element.

(of a set of elements) arranged as if on a circle, so that the first element follows the last.