white blood cell

Definition / meaning of white blood cell

A type of immune cell. Most white blood cells are made in the bone marrow and are found in the blood and lymph tissue. White blood cells help the body fight infections and other diseases. Granulocytes, monocytes, and lymphocytes are white blood cells. Also called leukocyte and WBC.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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