thrombus
noun [ C ] medical specialized uk/ˈθrɒm.bəs/ us/ˈθrɑːm.bəs/ thrombi (also blood clot)
血栓
a thick mass of blood that forms in a blood vessel and may block the flow of blood in the blood vessel
Arterial thrombosis is caused by a thrombus in an artery. 血栓形成的原因是动脉中出现血栓。