TARDIVE DYSKINESIA

[tar.dive dyskinesia] n [tardive tending toward late development (fr. F, fem. of tardif, fr. MF) + dyskinesia] (1964): a central nervous system disorder characterized by twitching of the face and tongue and involuntary motor movements of the trunk and limbs and occurring esp. as a side effect of prolonged use of antipsychotic drugs (as phenothiazine)