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acid (slang) LSD. [1/7 definitions]
LSD a powerful hallucinogenic drug, sometimes used in medical studies, as of schizophrenia; lysergic acid dimethylamide; LSD-25.
lysergic acid diethylamide see "LSD."
trip (slang) euphoria, hallucinations, or the like experienced under a drug, particularly that of the drug LSD, or the period of such an experience. [1/18 definitions]