myofibril

noun myo·fi·bril \ˌmī-ə-ˈfī-brəl, -ˈfi-\

Definition of MYOFIBRIL

: any of the longitudinal parallel contractile elements of a muscle cell that are composed of myosin and actin

— myo·fi·bril·lar \-brə-lər\ adjective

See myofibril defined for kids

New Latin myofibrilla, from my- + fibrilla fibril

First Known Use: 1898

Medical Dictionary

noun myo·fi·bril \ˌmī-ō-ˈfīb-rəl, -ˈfib-\

: one of the longitudinal parallel contractile elements of a muscle cell that are composed of myosin and actin

—myo·fi·bril·lar \-rə-lər\ adjective

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