Dictionary.net

Plasma glycoprotein clotted by thrombin, composed of a dimer of three non-identical pairs of polypeptide chains (alpha, beta, gamma) held together by disulfide bonds. Fibrinogen clotting is a sol-gel change involving complex molecular arrangements: whereas fibrinogen is cleaved by thrombin to form polypeptides A and B, the proteolytic action of other enzymes yields different fibrinogen degradation products.

A globulin of the blood-plasma which is converted into the coagulated protein, fibrin, by the action of fibrin-ferment in the presence of a salt of calcium; it is this change which produces coagulation of the blood.

Chief constituent of fibrin, obtained from blood plasma.

A soluble constituent of blood which yields fibrin and produces coagulation.

A globulin from which fibrin is mainly derived.

A proteid substance existing in blood and serous transudations, which is converted into fibrin by the action of thrombin. [Fibrin]