clotting factor

noun

1. Also called: coagulation factor. any one of a group of substances, including factor VIII, the presence of which in the blood is essential for blood clotting to occur

clotting factor

1. Any of various components of plasma involved in the coagulation of blood, including fibrinogen, prothrombin, and calcium ions. Hereditary deficiency of clotting factors can cause coagulation disorders such as hemophilia.