Pertaining to or occurring in a cycle or cycles. The term is applied to chemical compounds that contain a ring of atoms in the nucleus.
- c. adenosine monophosphate (AMP) — see cyclic adenosine monophosphate.
- c. guanosine monophosphate (cGMP) — see cyclic guanosine monophosphate.
- canine c. hematopoiesis — an abnormality of hematopoietic stem cells that results in detectable, cyclic fluctuations in numbers of circulating neutrophils. Affected dogs have an increased susceptibility to infections. The condition is inherited as an autosomal recessive in collies where it is occurs with a distinctive silver-gray coat color; called also gray collie syndrome.
- c. neutropenia — see canine cyclic hematopoiesis (above).
- c. non-breeder cows — cows demonstrating estrus regularly but not being submitted for mating; deferral of mating.
- c. nucleotide — see cyclic nucleotide.




