/pi per"euh zeen', -zin, puy-, pip"euhr euh-/ , n. Chem.
1. Also called piperazidine /pip'euh raz"i deen', -din, puy'peuh-/ . a colorless, crystalline, deliquescent ring compound, C 4 H 10 N 2 , prepared by the reaction of ethylene bromide or ethylene chloride with ammonia: used chiefly in veterinary medicine as an anthelmintic, and as an insecticide.
2. any derivative of this compound.
[ 1885-90; piper PEPPER + -AZINE ]