[dee-fahy-bruh-ley-ter, -fib-ruh-]
noun Medicine/Medical.
an agent or device for arresting fibrillation of the atrial or ventricular muscles of the heart.

1955–60; de- + fibrill(ation) + -ator Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
defibrillator (dɪˈfaɪbrɪˌleɪtə, -ˈfɪb-)
med an apparatus for stopping fibrillation of the heart by application of an electric current to the chest wall or directly to the heart

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1956, from defibrillation.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

defibrillator de·fib·ril·la·tor (dē-fĭb'rə-lā'tər, -fī'brə-)
An electrical device used to counteract fibrillation of the heart muscle and restore normal heartbeat by applying a brief electric shock.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
What you really need is a good defibrillator by your side.
In fact, moments after collapsing, the ref had his heart restarted by an automated external defibrillator.
He wants access to the data being collected inside his body by an implanted cardiac defibrillator.
They act as an instant defibrillator in the event of arrhythmia.
Image for defibrillator
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