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
See Origin of MYOFIBRIL
New Latin myofibrilla, from my- + fibrilla fibril
First Known Use: 1898
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