Pronunciation: (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.