1) Clotting factor 2) Coagulation factor 3) Factor iii 4) Thrombokinase 1) Thrombokinase 
Thromboplastin is a plasma protein aiding blood coagulation through catalyzing the conversion of prothrombin to thrombin. It is a complex enzyme that is found in brain, lung, and other tissues and especially in blood platelets and that functions in the conversion of prothrombin to thrombin in the clotting of blood—called also thrombokinase Altho...
<haematology> Traditional name for substance in plasma that converts prothrombin to thrombin. Now known not to be a single substance. (See thrombin). ... (18 Nov 1997) ... 
(throm″bo-plas´tin) tissue thromboplastin. tissue thromboplastin factor III.
Traditional name for substance in plasma that converts prothrombin to thrombin. Now known not to be a single substance. (See thrombin).
Type: Term Pronunciation: throm′bō-plas′tin Definitions: 1. A substance present in tissues, platelets, and leukocytes necessary for the coagulation of blood; in the presence of calcium ions thromboplastin is necessary for the conversion of prothrombin to thrombin, an important step in coagulation of blood. It is now generally belie...
A protein essential for blood clotting.
[n] - an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
thrombokinase noun an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot