prothrombin
- n a protein in blood plasma that is the inactive precursor of thrombin
- Therefore Vitamin K, the prothrombin stimulator, mightjust possiblykeep animals from getting hydrocarbon cancers.
- Their blood, he found, contained very little prothrombin, a blood element necessary for clotting.
- In one lab, "a ridiculous apartment kitchenette," a Schaeffer inspection team discovered a technician conducting prothrombin time testssensitive measurements of the blood's .