= clotting factor n. at clotting, n. additions.

any of a group of plasma proteins which are sequentially activated to form fibrin in the process of blood clotting; also called coagulation factor.

a clotting factor (factor V) that is a glycoprotein whose activated form participates in the conversion of prothrombin to thrombin.

a blood coagulation factor (factor VII) that is an enzyme which helps to activate factor X, which converts prothrombin to thrombin (cf. factor, n.…