In medicine it is a piece of plaque or clot that originates in one place and travels through the bloodstream to form a plugging or jam in a vein, artery or vessel. It can be generated by one or more clots.
EMBOLISM The definition of RAE is wrong, because embolism occurs when a thrombus moves through the bloodstream to settle elsewhere in the circulatory system (renamed embolus). An arterial embolism can be caused by one or more clots