[mahy-uh-fahy-bruh l, -fib-ruh l]

noun Cell Biology.

a contractile fibril of skeletal muscle, composed mainly of actin and myosin.

Origin of myofibril

First recorded in 1895–1900; myo- + fibril Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

myofibril in Medicine


[mī′ə-fībrəl, -fĭbrəl]


One of the threadlike longitudinal fibrils occurring in a skeletal or cardiac muscle fiber.sarcostyle
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.