myofibril
noun
myo·fi·bril
ˌmī-ə-ˈfī-brəl 
-ˈfi-
-ˈfi-
: any of the longitudinal parallel contractile elements of a muscle cell that are composed of myosin and actin
Examples of myofibril in a Sentence
Recent Examples on the Web
Sarcoplasmic and myofibril types are the two main categories under which this process falls.
—
Amber Smith, Discover Magazine, 12 Oct. 2022
Our bodies rebuild these tears by adding either sarcomeres, which are fibrous proteins inside muscle cells, or myofibrils—chains of rod-like units also in muscle cells that give them their striped appearance.
—Popular Science, 1 Jan. 2019
More myofibrils will increase the mass of a muscle cell while more sarcomeres will increase the length.
—Popular Science, 1 Jan. 2019
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Amber Smith, Discover Magazine, 12 Oct. 2022
Our bodies rebuild these tears by adding either sarcomeres, which are fibrous proteins inside muscle cells, or myofibrils—chains of rod-like units also in muscle cells that give them their striped appearance.
—Popular Science, 1 Jan. 2019
More myofibrils will increase the mass of a muscle cell while more sarcomeres will increase the length.
—Popular Science, 1 Jan. 2019
Dictionary Entries Near myofibril
Cite this Entry
“Myofibril.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/myofibril. Accessed 22 Dec. 2024.
Copy CitationKids Definition
myofibril
noun
myo·fi·bril
ˌmī-ō-ˈfīb-rəl
-ˈfib-
-ˈfib-
: any of the long thin contracting protein subunits of a muscle cell that are composed of actin and myosin filaments
Medical Definition
myofibril
noun
myo·fi·bril
ˌmī-ō-ˈfīb-rəl, -ˈfib-
: one of the longitudinal parallel contractile elements of a muscle cell that are composed of myosin and actin
Love words? Need even more definitions?
Merriam-Webster unabridged
Share