a plasma protein involved in blood coagulation that on activation by factors in the plasma is converted to thrombin.
- Also called thrombogen.
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British Dictionary definitions for prothrombin
biochem a zymogen found in blood that gives rise to thrombin on activation: See also phylloquinone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for prothrombin
A glycoprotein that is converted to thrombin during blood clotting. Prothrombin is formed by and stored in the liver.
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