myo·fi·bril /ˌmaɪəˈfaɪbrəl, ˈfɪ-/ 肌原纖維; 肌原纖維
myo·fi·bril /ˌmaɪoˈfaɪbrəl, ˈfɪb-/ 名詞 肌原纖維
myofibril n : one of many contractile filaments that make up a striated muscle fiber [syn: myofibrilla, sarcostyle]