clonic

[Gr. klo`nos a violent, confused motion; cf. F. clonique.]
(Med.) Having an irregular, convulsive motion. Dunglison.

Clonic spasm. (Med.) See under Spasm.

The alternating pattern of releasing and tightening a muscle.

Pertaining to or characterized by clonus, e.g. clonic convulsions.

• c.–tonic — a seizure in which there are clonic and tonic phases with jerking and flexing of muscles alternating with relaxation.