thromboplastin definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a substance released from blood platelets and injured body tissues that assists in the clotting of the blood by initiating the conversion of prothrombin to thrombin
Origin: thrombo- plush -plast plush -in
thromboplastin definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A protease that converts prothrombin to thrombin in the early stages of blood clotting. Also called thrombokinase.
thromboplastin - Medical Definition
A plasma protein present in tissues, platelets, and white blood cells necessary for the coagulation of blood and, in the presence of calcium ions, necessary for the conversion of prothrombin to thrombin. Also called factor III, platelet tissue factor, thrombokinase.