or tran·quil·liz·er

[ trang-kwuh-lahy-zer ]
/ ˈtræŋ kwəˌlaɪ zər /


a person or thing that tranquilizes.
a drug that has a sedative or calming effect without inducing sleep.

Origin of tranquilizer

First recorded in 1790–1800; tranquilize + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tranquilizer

Word Origin and History for tranquilizer



"sedative," 1824 (first reference is to ground ivy), agent noun from tranquilize; in reference to one of a large group of anti-anxiety drugs, it is recorded by 1956.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for tranquilizer


[ trăngkwə-līz′ər, trăn- ]


Any of various drugs used to reduce tension or anxiety; an antianxiety agent.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.