White-blood-cell definitions

Any of various nucleated blood cells that lack hemoglobin and function in the immune system to protect against agents of infection and foreign matter. White blood cells include neutrophils, eosinophils, basophils, lymphocytes, and monocytes.
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Any of various cells that in adult mammals are produced in bone marrow, have a nucleus but no hemoglobin, and function in the immune system by protecting against pathogens and aiding in tissue repair. White blood cells include neutrophils, eosinophils, basophils, lymphocytes, and monocytes, and they are found in blood, lymph, and certain tissues.
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Any of various white or colorless cells in the blood of vertebrate animals, many of which participate in the inflammatory and immune responses to protect the body against infection and to repair injuries to tissues. White blood cells are formed mainly in the bone marrow, and unlike red blood cells, have a cell nucleus. The major types of white blood cells are granulocytes , lymphocytes , and monocytes . White blood cells are far less numerous in the blood than red blood cells, but their amount usually increases in response to infection and can be monitored as part of a clinical assessment.
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(hematology, cytology, immunology) A type of blood cell that is involved with an immune response, or part of the immune system.
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