Skip to Content


Pronunciation: mi'o-fi'bril

Definition: One of the fine longitudinal fibrils occurring in a skeletal or cardiac muscle fiber comprising many regularly overlapped ultramicroscopic thick and thin myofilaments.

Synonym(s): muscular fibril, myofibrilla

[myo- + Mod. L. fibrilla, fibril]

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

Medical Disclaimer