Definition of thrombin in English:

Share this entry


Pronunciation: /ˈTHrämbən/


An enzyme in blood plasma that causes the clotting of blood by converting fibrinogen to fibrin.
Example sentences
  • In addition to its role in activation of fibrin clot formation, thrombin plays an important regulatory role in coagulation.
  • Fibrinogen is modified by thrombin to produce fibrin monomers that are the primary constituent of the fibrin clot.
  • The blood-clotting cascade ends in the formation of a substance that converts a blood protein called prothrombin into the protein thrombin, which actually forms the substance of the blood clot.


Late 19th century: from Greek thrombos 'blood clot' + -in1.

For editors and proofreaders

Syllabification: throm·bin

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.