from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See thromboplastin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A proteolytic enzyme, that converts prothrombin into thrombin during the clotting of blood
from The Century Dictionary and Cyclopedia
- n. A kinase found in the tissues and the formed elements of the blood, which in the presence of a calcium salt activates the proenzym of the fibrin ferment, thrombogen.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
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