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WordReference Random House Unabridged Dictionary of American English © 2024fi•bril•la•tion (fī′brə lā′shən, or, esp. for 2, fib′rə-),USA pronunciation n. - Developmental Biologythe formation of fibrils.
- Pathologyuncontrolled twitching or quivering of muscular fibrils.
- fibrillate + -ion 1830–40
Collins Concise English Dictionary © HarperCollins Publishers:: fibrillation /ˌfaɪbrɪˈleɪʃən ˌfɪb-/ n - 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
fib•ril•late /ˈfɪbrəˌleɪt, ˈfaɪbrə-/USA pronunciation v., -lat•ed, -lat•ing. - Pathology(of muscular tissue) to twitch or quiver uncontrollably: [no object]Suddenly the patient's heart began to fibrillate.[~ + object]The machine sent electrical shocks to the heart and fibrillated it.
fib•ril•la•tion /ˌfɪbrəˈleɪʃən, ˌfaɪbrə-/USA pronunciation n. [uncountable] WordReference Random House Unabridged Dictionary of American English © 2024fi•bril•late (fī′brə lāt′, fib′rə-),USA pronunciation v., -lat•ed, -lat•ing. v.t. - Pathologyto cause to undergo fibrillation.
v.i. - Pathologyto undergo fibrillation.
- fibrill(a) + -ate1 1830–40
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