fi·​brin·​o·​gen | \ fī-ˈbri-nə-jən How to pronounce fibrinogen (audio) \

Definition of fibrinogen

: a plasma protein that is produced in the liver and is converted into fibrin during blood clot formation

Examples of fibrinogen in a Sentence

Recent Examples on the Web For instance, estrogen increases the activity of fibrinogen, a blood plasma protein that promotes coagulation. Sarah Jacoby, SELF, 12 Aug. 2020 Meanwhile another venom protein, disintegrin, acted as a magnet to my platelets and fibrinogen, molecular components that help blood clot. Kyle Dickman, Outside Online, 20 June 2018 In this complex process known as a coagulation cascade, an enzyme in your blood called thrombin allows a protein called fibrinogen to form a net-like structure that hardens and contracts. Korin Miller, SELF, 15 Dec. 2017 Exactly what will be in thread, Page isn’t quite sure — maybe collagens, maybe fibrinogens. Noah Shachtman, WIRED, 25 Mar. 2009

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fibrinogen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of fibrinogen

1872, in the meaning defined above

History and Etymology for fibrinogen

International Scientific Vocabulary

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Time Traveler for fibrinogen

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The first known use of fibrinogen was in 1872

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Cite this Entry

“Fibrinogen.” Dictionary, Merriam-Webster, Accessed 17 Aug. 2022.

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More Definitions for fibrinogen


fi·​brin·​o·​gen | \ fī-ˈbrin-ə-jən How to pronounce fibrinogen (audio) \

Medical Definition of fibrinogen

: a plasma protein that is produced in the liver and is converted into fibrin during blood clot formation

More from Merriam-Webster on fibrinogen Encyclopedia article about fibrinogen


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