myofibril

[ mahy-uh-fahy-bruh l, -fib-ruh l ]
/ ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl /

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for myofibril

myofibril
[ mī′ə-fībrəl, -fĭbrəl ]

n.

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.