1. Pertaining to, or characteristic of, a cycle; occurring periodically, denoting the course of the symptoms in certain diseases or disorders. 2. In chemistry, continuous, without end, as in a ring; denoting a c. compound.
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cyc·lic (sikґlik) (siґklik) 1. pertaining to or occurring in a cycle or cycles. 2. pertaining to a chemical compound that contains a ring of atoms in the nucleus; opposed to one that is aliphatic (q.v.). See also closed chain, under chain.Medical dictionary. 2011.