Pronunciation: (trang'kwu-lī"zur), [key]
1. a person or thing that tranquilizes.
2. a drug that has a sedative or calming effect without inducing sleep.
3. See antianxiety drug.
4. antipsychotic (def. 2). Also,tran'quil•liz"er.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.