[ dee-fahy-bruh-ley-ter, -fib-ruh- ]
/ diˈfaɪ brəˌleɪ tər, -ˈfɪb rə- /

noun Medicine/Medical.

an agent or device for arresting fibrillation of the atrial or ventricular muscles of the heart.

Origin of defibrillator

First recorded in 1955–60; de- + fibrill(ation) + -ator Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for 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 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for defibrillator

[ dē-fĭbrə-lā′tər, -fībrə- ]


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.