Automated External Defibrillator, a portable medical device that diagnoses cardiac arrhythmias and can deliver electrical therapy to restore normal heart rhythm during sudden cardiac arrest.
Acronym formed from 'Automated External Defibrillator,' with 'defibrillator' coming from 'de-' (removal) and 'fibrillation' (from Latin 'fibrilla,' small fiber), referring to the chaotic quivering of heart muscle fibers.
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