follow Dictionary.com

Today's Word of the Day means...

myofibril

[mahy-uh-fahy-bruh l, -fib-ruh l] /ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl/
noun, Cell Biology
1.
a contractile fibril of skeletal muscle, composed mainly of actin and myosin.
Origin
1895-1900
1895-1900; myo- + fibril
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
myofibril in Medicine

myofibril my·o·fi·bril (mī'ə-fī'brəl, -fĭb'rəl)
n.
One of the threadlike longitudinal fibrils occurring in a skeletal or cardiac muscle fiber. Also called sarcostyle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Encyclopedia Article for myofibril

very fine contractile fibres, groups of which extend in parallel columns along the length of striated muscle fibres. The myofibrils are made up of thick and thin myofilaments, which help give the muscle its striped appearance. The thick filaments are composed of myosin, and the thin filaments are predominantly actin, along with two other muscle proteins, tropomyosin and troponin. Muscular contraction is caused by the interaction between actin and myosin as they temporarily bind to each other and are released.

Learn more about myofibril with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of The Day

Difficulty index for myofibril

Few English speakers likely know this word

Word Value for myofibril

19
0
Scrabble Words With Friends