A protein or substance that blocks fibrinolysis, the body's natural process of breaking down blood clots.
From anti- + fibrinolysin (enzyme that breaks down fibrin in blood clots). Medical term developed in the 20th century to describe clot-stabilizing factors.
Your body has tiny soldiers called antifibrinolysins that stand guard over blood clots and say 'not so fast' to your clot-dissolving enzymes, which is why wounds stop bleeding!
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