tranquillizer

Definition of Tranquillizer in English :

a drug used to reduce stress or tension without reducing mental clarity

WordNet Lexical Database for English. Princeton University. 2010.

Tranquillizer

noun

1.

a drug that calms a person without affecting clarity of consciousness

2.

anything that tranquillizes

n.

1. One that serves to tranquilize, as soothing music.

2. Any of various drugs used to reduce tension or anxiety; an antianxiety agent.

3. Any of various drugs used to treat psychotic states; an antipsychotic drug. Not in scientific use.