fibrillation

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noun fi·bril·la·tion \ˌfi-brə-ˈlā-shən, ˌfī-\

Definition of fibrillation

  1. 1 :  an act or process of forming fibers or fibrils

  2. 2a :  a muscular twitching involving individual muscle fibers acting without coordinationb :  very rapid irregular contractions of the muscle fibers of the heart resulting in a lack of synchronism between heartbeat and pulse

Recent Examples of fibrillation from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fibrillation'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

1845

First Known Use of fibrillation

1845


Medical Dictionary

fibrillation

play play
noun fi·bril·la·tion \ˌfib-rə-ˈlā-shən, ˌfīb-\

Medical Definition of fibrillation

  1. 1:  an act or process of forming fibers or fibrils

  2. 2a:  a muscular twitching involving individual muscle fibers acting without coordinationb:  very rapid irregular contractions of the muscle fibers of the heart resulting in a lack of synchronism between heartbeat and pulse—see atrial fibrillation, ventricular fibrillation



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