məˈperəˌdēn, -_də̇n noun
( -s )
Etymology: me thyl + pi peridine
: a synthetic narcotic drug C 15 H 21 NO 2 used in the form of its crystalline hydrochloride as an analgesic, sedative, and antispasmodic; ethyl 1-methyl-4-phenyl-piperidine-4-carboxylate