Definition of myofibrillar in English:
myofibrillar
adjective ˌmʌɪə(ʊ)fɪˈbrɪləˌmʌɪə(ʊ)fʌɪˈbrɪlə
Physiology Histology Of or relating to myofibrils.
Origin
1920s; earliest use found in Quarterly Review of Biology. From myo- + fibrillar, after myofibril. Compare French myofibrillaire.