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Definition of Meperidine hydrochloride
1. Noun. A synthetic narcotic drug (trade name Demerol) used to treat pain.
Medical Definition of Meperidine hydrochloride
1. Ethyl 1-methyl-4-phenylisonipecotate hydrochloride;a widely used narcotic analgesic. Synonym: pethidine. (05 Mar 2000)