pīˈperəˌzēn, pə̇ˈp-, ˈpipər- noun
( -s )
Etymology: International Scientific Vocabulary, blend of piperidine and az-
1. : a crystalline heterocyclic base C 4 H 10 N 2 or C 4 H 10 N 2 .6H 2 O obtained usually by the action of ammonia on ethylene dibromide or ethylene dichloride or by reduction of pyrazine and used in medicine especially as an anthelmintic; hexahydro-pyrazine
2. : a derivative of piperazine — compare diketopiperazine