defibrillate To arrest the fibrillation or muscular twitching involving individual muscle fibers acting without coordination of (heart muscle) by applying electric shock across the chest, thus depolarizing the heart cells and allowing normal rhythm to return. Found on http://www.wordinfo.info/words/index/info/view_unit/792/
verb stop the fibrillation and restore normal contractions, usually by means of electric shocks; `The patient`s heart had to be defibrillated to save his life` Found on https://www.encyclo.co.uk/local/20974
to arrest the fibrillation of (heart muscle) by applying electric shock across the chest, thus depolarizing the heart cells and allowing normal rhythm to return. Found on https://www.infoplease.com/dictionary/defibrillate