white blood cell

white blood cell
any of various nearly colorless cells of the immune system that circulate mainly in the blood and lymph and participate in reactions to invading microorganisms or foreign particles, comprising the B cells, T cells, macrophages, monocytes, and granulocytes. Also called leukocyte, white blood corpuscle, white corpuscle, white cell.
[1885-90]

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Universalium. 2010.

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