Dictionaryde•fi•bril•latePronunciation: (dē-fī'bru-lāt", -fib'ru-), [key] —v.t., -lat•ed, -lat•ing. Med. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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