fibrillation [fahy-br uh- ley-sh uh n, or especially for 2, fib-r uh-] EXAMPLES | WORD ORIGIN noun . Pathology uncontrolled twitching or quivering of muscular fibrils.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for fibrillation Historical Examples of fibrillation British Dictionary definitions for fibrillation noun a local and uncontrollable twitching of muscle fibres, esp of the heart, not affecting the entire muscle. Atrial fibrillation results in rapid and irregular heart and pulse rate. In ventricular fibrillation, the heart stops beating irregular twitchings of the muscular wall of the heart, often interfering with the normal rhythmic contractions
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
Word Origin and History for fibrillation
Online Etymology Dictionary, © 2010 Douglas Harper
fibrillation [fĭb′rə-lā ′shən, fī′brə-] n. Fine, rapid twitching of individual muscle fibers with little or no movement of the muscle as a whole. The formation of fibrils. Vermicular twitching, usually slow, of individual muscular fibers, commonly occurring in the atria or ventricles of the heart and in recently denervated skeletal muscle fibers.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A rapid twitching of muscle fibers, as of the heart, that is caused by the abnormal discharge of electrical nerve impulses. Ventricular fibrillation is life-threatening.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.