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
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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

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Cite this Entry

“Fibronectin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fibronectin. Accessed 13 Jan. 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
Last Updated: - Updated example sentences
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