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myofibril

American  
[mahy-uh-fahy-bruhl, -fib-ruhl] / ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl /

noun

Cell Biology.
  1. a contractile fibril of skeletal muscle, composed mainly of actin and myosin.


Etymology

Origin of myofibril

First recorded in 1895–1900; myo- + fibril

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