thrombosis Meaning, Definition & Usage

  1. noun the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel

WordNet

Throm*bo"sis noun
Etymology
NL. See Thrombus.
Definitions
  1. (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.

Webster 1913