TRANQUILIZER
tranquilizer, tranquillizer, tranquilliser, antianxiety agent, ataractic drug, ataractic agent, ataractic
(noun) a drug used to reduce stress or tension without reducing mental clarity
Source: WordNet® 3.1
Etymology
Noun
tranquilizer (plural tranquilizers)
That which tranquillizes or soothes.
(pharmaceutical drug) A drug used to reduce anxiety or tension; a sedative.
Synonyms
• (drug): tranq, trank (slang); tranx (slang, plural)
Source: Wiktionary
Tran"quil*i`zer, Tran"quil*li`zer, n.
Definition: One who, or that which, tranquilizes.
Source: Webster’s Unabridged Dictionary 1913 Edition