[ throm-buh-plas-tin ]

  1. Biochemistry. a lipoprotein in the blood that converts prothrombin to thrombin.

  2. Pharmacology. a commercial form of this substance, obtained from the brains of cattle, used chiefly as a local hemostatic and as a laboratory reagent in blood prothrombin tests.

Origin of thromboplastin

First recorded in 1910–15; thrombo- + -plast + -in2
  • Also called throm·bo·ki·nase [throm-boh-kahy-neys, -kin-eys]. /ˌθrɒm boʊˈkaɪ neɪs, -ˈkɪn eɪs/.

Words Nearby thromboplastin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

British Dictionary definitions for thromboplastin


/ (ˌθrɒmbəʊˈplæstɪn) /

  1. any of a group of substances that are liberated from damaged blood platelets and other tissues and convert prothrombin to thrombin: Also called: thrombokinase

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