[klawr-prom-uh-zeen, klohr-]


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.

Origin of chlorpromazine

First recorded in 1950–55; chlor-2 + pro(pyl) + (a)m(ine) + azine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for chlorpromazine



a drug derived from phenothiazine, used as a tranquillizer and sedative, esp in psychotic disorders. Formula: C 17 H 19 ClN 2 S

Word Origin for chlorpromazine

C20: from chloro- + pro (pyl + a) m (ine) + azine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for chlorpromazine


[klôr-prŏmə-zēn′, -prōmə-]


A phenothiazine antipsychotic agent with antiemetic, antiadrenergic, and anticholinergic actions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.