myofibril


myo·fi·bril

noun \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

Origin of MYOFIBRIL

New Latin myofibrilla, from my- + fibrilla fibril
First Known Use: 1898

myo·fi·bril

noun \ˌmī-ō-ˈfīb-rəl, -ˈfib-\   (Medical Dictionary)

Medical Definition of MYOFIBRIL

: 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

Illustration of MYOFIBRIL

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