Fibrillation

//ˌfɪbɹɪˈleɪʃən// noun

noun ·Moderate ·College level

Definitions

Noun
  1. 1
    The rapid, irregular, and unsynchronized contraction of the muscle fibers of the heart. countable, uncountable

    "Though occasionally a “flatliner” can be revived with a defib, it is most commonly used to change the uncoordinated contractions of the heart (fibrillation) into a normal sinus rhythm—that is, to defibrillate the heart."

  2. 2
    act or process of forming fibrils wordnet
  3. 3
    muscular twitching involving individual muscle fibers acting without coordination wordnet

Synonyms

All synonyms
abscessagueanemiaankylosisanoxiaapnea

Example

More examples

"I suffer from heart fibrillation."

Etymology

From fibrilla + -ation.

Related phrases

atrial fibrillationauricular fibrillationventricular fibrillationmuscle fiber

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.