| thrombo | an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot |
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| thrombo | become blocked by a thrombus |
| thrombo | affected with or obstructed by a clot of coagulated blood |
| thrombo | the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel |