noun
- a protein in blood plasma that is converted to thrombin during blood clotting
Usage: medical; biochemistry
Examples
- Prothrombin is produced by the liver and stored in blood plasma.
- The doctor ordered a prothrombin time test to check blood clotting ability.
- Vitamin K deficiency can lead to decreased prothrombin production.
- During coagulation, prothrombin is activated by various clotting factors.
- The patient’s prothrombin levels were monitored after surgery.
- Warfarin works by interfering with prothrombin synthesis.