fasciculation
/fəˌsɪkjəˈleɪʃən/
noun
- A small, involuntary twitching of muscle fibers, often visible under the skin.
- The doctor explained that a fasciculation is usually harmless but can sometimes indicate a nerve problem.
- She felt a brief fasciculation in her eyelid that lasted only a few seconds.
- After his workout, he noticed a fasciculation in his bicep.