Pulmonary embolus

Pulmonary embolus: A blood clot that has passed into and occluded the lung's pulmonary artery. An embolus causes an embolism. In this case, the embolus, a clot or foreign material, has been carried through the blood into the pulmonary artery or one of its branches, plugging the vessel.

Common Misspellings: pulmanary embolus, pulmenary embolus