Definition of prothrombin in English:

prothrombin

Line breaks: pro|throm¦bin
Pronunciation: /prəʊˈθrɒmbɪn
 
/

noun

[mass noun] Biochemistry
A protein present in blood plasma which is converted into active thrombin during coagulation.
More example sentences
  • Contact with tissue factor triggers the coagulation cascade, resulting in the conversion of prothrombin to active thrombin.
  • This complex activates prothrombin to thrombin in the presence of calcium ions.
  • Years ago we said fibrinogen (a soluble protein) becomes a clot of insoluble fibrin by the action of thrombin made from soluble prothrombin in the presence of calcium.

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