- an enzyme of the blood plasma that catalyzes the conversion of fibrinogen to fibrin, the last step of the blood clotting process.
Origin of thrombin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for thrombin
It is not yet certain what is the nature of the final reaction between fibrinogen and thrombin.
Thrombin, on the other hand, does not exist in living blood, but only makes its appearance there after blood is shed.
The last step in the change is the action of thrombin upon fibrinogen to form fibrin, and the clot is complete.
First, it is found that thrombin becomes converted very quickly into an inactive modification.
The coagulating enzymes, such as thrombin or thrombase (the fibrin ferment) and rennin, which causes the clotting of milk.Dietetics for Nurses
Fairfax T. Proudfit
- biochem an enzyme that acts on fibrinogen in blood causing it to clot
- An enzyme in blood formed from prothrombin that facilitates blood clotting by reacting with fibrinogen to form fibrin.thrombase
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- An enzyme in blood that catalyzes the conversion of fibrinogen to fibrin and is essential to the coagulation of blood.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.