fibronectin

noun

fi·​bro·​nec·​tin ˌfī-brə-ˈnek-tən How to pronounce fibronectin (audio)
: any of a group of glycoproteins of cell surfaces, blood plasma, and connective tissue that promote cellular adhesion and migration

Examples of fibronectin in a Sentence

Recent Examples on the Web
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.
Further experiments revealed that the extracellular vesicles stopped senescence by using the extracellular matrix protein fibronectin, which coats their surfaces and then causes a release of enzymes that block the effects of oxidative stress which unleash senescence. New Atlas, 4 Jan. 2026

Word History

Etymology

fibr- + Latin nectere to tie, bind + English -in

First Known Use

1976, in the meaning defined above

Time Traveler
The first known use of fibronectin was in 1976

Browse Nearby Words

Cite this Entry

“Fibronectin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fibronectin. Accessed 10 Mar. 2026.

Medical Definition

fibronectin

noun
fi·​bro·​nec·​tin ˌfī-brə-ˈnek-tən How to pronounce fibronectin (audio)
: any of a group of glycoproteins of cell surfaces, blood plasma, and connective tissue that promote cellular adhesion and migration
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster