- a grayish-white, crystalline powder, C17H19ClN2S, derived from phenothiazine, used chiefly to inhibit nausea and vomiting and as a major tranquilizer in the management of schizophrenia and related psychoses.
- a drug derived from phenothiazine, used as a tranquillizer and sedative, esp in psychotic disorders. Formula: C 17 H 19 ClN 2 S
