defibrillator
noun [ C ] specialized uk/ˌdiːˈfɪb.rɪ.leɪ.tər/ us/ˌdiːˈfɪb.rə.leɪ.t̬ɚ/
（心脏）除颤器
a machine that uses an electric current to stop any irregular and dangerous activity of the heart's muscles, used especially in hospitals
Defibrillators are used to restore normal rhythm to the heart. 心脏除颤器可用于恢复正常心律。