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NCI Dictionary of Cancer Terms


macrophage  listen  (MA-kroh-fayj)

  A type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.

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Blood cells; drawing shows six types of white blood cells (monocytes, lymphocytes, neutrophils, eosinophils, basophils, and macrophages), a red blood cell (erythrocyte), and platelets.