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fibrillate verb

  /ˈfɪbrɪleɪt/ , /ˈfʌɪbrɪleɪt/
  • (intransitive) To make rapid irregular movements.
 треперя неконтролируемо

fibrillation noun

  /ˌfɪbɹɪˈleɪʃən/
  • The rapid, irregular, and unsynchronized contraction of the muscle fibers of the heart.
 фибрилация
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