A potent natural inhibitor of platelet aggregation and a powerful vasodilator. SYN: epoprostenol, epoprostenol sodium.
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pros·ta·cy·clin .präs-tə-'sī-klən n a prostaglandin that is a metabolite of arachidonic acid, inhibits aggregation of platelets, and dilates blood vessels
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pros·ta·cy·clin (pros″tə-siґklin) a prostaglandin, PGI2, synthesized by endothelial cells lining the cardiovascular system; it is the most potent known inhibitor of platelet aggregation and a powerful vasodilator and thus is a physiologic antagonist of thromboxane A2. When used pharmaceutically, it is called epoprostenol.Medical dictionary. 2011.