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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

narcotic
a drug that produces numbness or stupor

noun.artifact

7 Subcategories

hard drug go
a narcotic that is considered relatively strong and likely to cause addiction
meperidine, meperidine hydrochloride, Demerol go
a synthetic narcotic drug (trade name Demerol) used to treat pain
methadone, methadone hydrochloride, methadon, dolophine hydrochloride, fixer, synthetic heroin go
synthetic narcotic drug similar to morphine but less habit-forming
opiate go
a narcotic drug that contains opium or an opium derivative
opium go
an addictive narcotic extracted from seed capsules of the opium poppy
recreational drug go
a narcotic drug that is used only occasionally and is claimed to be nonaddictive
soft drug go
a drug of abuse that is considered relatively mild and not likely to cause addiction