Dictionary.com

myofibril

[ mahy-uh-fahy-bruhl, -fib-ruhl ]
/ ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl /
Save This Word!

noun Cell Biology.

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

QUIZZES

QUIZ YOURSELF ON AFFECT VS. EFFECT!

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.

Origin of myofibril

First recorded in 1895–1900; myo- + fibril
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Medical 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.
Learning At Home Just Got Easier!