Meaning

noun a white insoluble fibrous protein formed by the action of thrombin on fibrinogen when blood clots; it forms a network that traps red cells and platelets

originEtymology tree English fibre Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English fibrin From fibre + -in (used to form chemical names of proteins, etc).

Etymology from Wiktionary, CC BY-SA 3.0