- thrombosis - the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel
--1 is a kind of occlusion
--1 has part: thrombus
--1 has particulars:cerebral thrombosis; coronary thrombosis, coronary; milk leg, white leg, phlegmasia alba dolens; phlebothrombosis, venous thrombosis