English > clotting factor: 1 sense > noun 1, substance| Meaning | Any of the factors in the blood whose actions are essential for blood coagulation. |
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| Synonym | coagulation factor |
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| Narrower | Christmas factor, factor IX | coagulation factor whose absence is associated with hemophilia B |
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| Hageman factor, factor XII | coagulation factor whose deficiency results in prolongation of clotting time of venous blood |
| antihemophilic factor, antihaemophilic factor, antihemophilic globulin, antihaemophilic globulin, factor VIII, Hemofil | A coagulation factor (trade name Hemofil) whose absence is associated with hemophilia A |
| calcium ion, factor IV | ion of calcium |
| fibrinase, factor XIII | In the clotting of blood thrombin catalyzes factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot |
| fibrinogen, factor I | A protein present in blood plasma |
| plasma thromboplastin antecedent, factor XI | coagulation factor whose deficiency results in a hemorrhagic tendency |
| proaccelerin, prothrombin accelerator, accelerator factor, factor V | A coagulation factor |
| proconvertin, cothromboplastin, stable factor, factor VII | A coagulation factor formed in the kidney under the influence of vitamin K |
| prothrombin, factor II | A protein in blood plasma that is the inactive precursor of thrombin |
| prothrombinase, factor X | coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors |
| thromboplastin, thrombokinase, factor III | An enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot / clot |
| Broader | plasma protein | Any of the proteins in blood plasma |
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