embolization

embolization The clogging of small blood vessels with a substance that blocks the flow of blood. Embolization can occur as an abnormal natural event, such as when a blood clot travels from the leg to lodge in the blood vessels of the lungs, or it can be used as a treatment method, such as when material is purposely placed in blood vessels that supply a tumor in the hopes of destroying that tumor. See also embolism.