Something that travels through the bloodstream, lodges in a blood vessel and blocks it. Examples of emboli are a detached blood clot, a clump of bacteria, and foreign material such as air. Pulmonary emboli are blood clots that have been carried through the blood into the pulmonary artery (the main blood vessel from the heart to the lung) or one of [..]

A detached thrombus or air bubble traveling and obstructing another blood vessel.

(n) an abnormal particle (e.g. an air bubble or part of a clot) circulating in the blood

Material, usually blood clot but may be fat, bone fragment, nitrogen bubble or bullet, that travels through the circulation, eventually obstructing blood flow through a smaller calibre vessel (for example stroke, pulmonary embolism, central retinal artery occlusion).