Definition of myofibril in English:

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Pronunciation: /ˌmīōˈfībrəl/ Pronunciation: /-ˈfib-/


Any of the elongated contractile threads found in striated muscle cells.
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.

For editors and proofreaders

Syllabification: my·o·fi·bril

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