血栓症
Thrombosis \Throm*bo"sis\, n. [NL. See {Thrombus}.] (Med.) The obstruction of a blood vessel by a clot formed at the site of obstruction; -- distinguished from embolism, which is produced by a clot or foreign body brought from a distance. -- {Throm*bot"ic}, a.
thrombosis n : the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel