prothrombin

[ proh-throm-bin ]

noun

, Biochemistry.

1. a plasma protein involved in blood coagulation that on activation by factors in the plasma is converted to thrombin.

prothrombin

/ prəʊˈθrɒmbɪn /

noun

1. See phylloquinone
   biochem a zymogen found in blood that gives rise to thrombin on activation See also phylloquinone

prothrombin

/ prō-thrŏm′bĭn /

1. A glycoprotein that is converted to thrombin during blood clotting. Prothrombin is formed by and stored in the liver.

Word History and Origins

Origin of prothrombin¹

First recorded in 1895–1900; pro- ¹ + thrombin