A blockage or plug that obstructs a blood 'vessel. Examples of emboli are detached blood clots, clumps of bacteria, and clumps of other foreign material, such as air.

The collection of something in a blood vessel

A plug, composed of a detached blood clot, mass of bacteria or other tissue, air or other foreign body, completely or partially blocking a vessel.

1660s, "stopper, wedge," from Latin embolus "piston of a pump," from Greek embolos "peg, stopper; anything pointed so as to be easily thrust in," also "a tongue (of [..]

A particle, such as a blood clot or an air bubble, in the blood stream.

A "wandering" blood clot.

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

A blood clot or particle that forms in one part of the body then moves through the bloodstream and lodges in a blood vessel elsewhere, blocking blood flow.

N M piston

Portion of a blood clot that breaks free and travels through the cardiovascular system.

a "wandering" blood clot.

(plural, emboli)