fibrin

American  

[fahy-brin] / ˈfaɪ brɪn /

noun

1. the insoluble protein end product of blood coagulation, formed from fibrinogen by the action of thrombin in the presence of calcium ions.

2. Botany. a fibrinlike substance found in some plants; gluten.

---

fibrin British  

/ ˈfɪbrɪn /

noun

1. a white insoluble elastic protein formed from fibrinogen when blood clots: forms a network that traps red cells and platelets

---

fibrin Scientific  

/ fī′brĭn /

1. A fibrous protein produced by the action of thrombin on fibrinogen and essential to the coagulation of blood. Fibrin works by forming a fibrous network in which blood cells become trapped, thereby producing a clot.

---

Other Word Forms

• fibrinous adjective

Etymology

Origin of fibrin

First recorded in 1790–1800; fibr- + -in ²

Compare meaning

How does fibrin compare to similar and commonly confused words? Explore the most common comparisons:

• fibrin vs. fibrinogen

Example Sentences

Its amino acid sequence differs from gyroxine, a toxin taken directly from rattlesnake venom and used in fibrin sealant production.

From Science Daily • Nov. 18, 2025

The scientists leveraged prior research from Gladstone investigator Katerina Akassoglou, PhD, who discovered that a blood-clotting protein called fibrin creates a cascade of toxic effects when it leaks into the brain through damaged blood vessels.

From Science Daily • Nov. 26, 2024

For patients who are seeking a youthful refresh, she and her nurses first suggest bio-stimulating treatments like platelet-rich fibrin matrix.

From Los Angeles Times • Jul. 11, 2024

As one clotting factor is activated, it activates the next factor in sequence until a fibrin clot is achieved.

From Textbooks • Jun. 9, 2022

It is also stated by these physiologists, that revival takes place likewise when the blood injected had been previously deprived of its fibrin.

From Curiosities of Medical Experience by Millingen, J. G. (John Gideon)