embolus

Noun
  1. An abnormal particle (e.g. an air bubble or part of a clot) circulating in the blood (synset 114396812)
    is a type of: clot, coagulum - a lump of material formed from the content of a liquid
    is a part of: embolism - occlusion of a blood vessel by an embolus (a loose clot or air bubble or other particle)

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