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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

causal agent, cause, causal agency go
any entity that produces an effect or is responsible for events or results

agent go
a substance that exerts some force or effect

drug go
a substance that is used as a medicine or narcotic

drug of abuse, street drug go
a drug that is taken for nonmedicinal reasons (usually for mind-altering effects)

sedative, sedative drug, depressant, downer go
a drug that reduces excitability and calms a person

sedative-hypnotic, sedative-hypnotic drug
a sedative that depresses activity of the central nervous system and reduces anxiety and induces sleep

noun.artifact

5 Subcategories

barbiturate go
organic compound having powerful soporific effect
ethchlorvynol, Placidyl go
a mild sedative-hypnotic drug (trade name Placidyl)
methaqualone, Quaalude go
sedative-hypnotic drug (trade name Quaalude) that is a drug of abuse
thalidomide go
a sedative and hypnotic drug
tranquilizer, tranquillizer, tranquilliser, antianxiety agent, ataractic drug, ataractic agent, ataractic go
a drug used to reduce stress or tension without reducing mental clarity