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Word of the Day Wednesday, June 10, 2026

prothrombin

/prəˈθrɒmbɪn/ noun · British & US
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What does prothrombin mean?

noun

A protein in the blood plasma that is converted into thrombin during blood coagulation. It is a precursor to thrombin and plays a crucial role in the clotting of blood.

Example

"The prothrombin time test is used to evaluate the extrinsic pathway of blood coagulation."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for prothrombin

Rhymes with prothrombin

Etymologically related