Definition of myofibril in English:

myofibril

Line breaks: myo|fib¦ril
Pronunciation: /ˌmʌɪə(ʊ)ˈfʌɪbrɪl
 
/

noun

  • Any of the elongated contractile threads found in striated muscle cells.
    More example sentences
    • In cross section, skeletal muscle fibers are seen to be composed of numerous small aggregates of contractile substance, the myofibrils.
    • Briefly, the cardiac myofibrils are composed of the major contractile proteins, actin and myosin.
    • Individual muscle cells are extremely elongated and enclose many-stranded cables woven from threads called myofibrils.

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