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natural killer cell |
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Natural killer (NK) cell A lymphocyte that acts as a primary immune defense against infection. Mentioned in: Chronic Fatigue Syndrome natural killer cell (NK cell) Etymology: L, natura + ME, kullen, to kill, cella, storeroom a lymphocyte that is capable of binding to and killing virus-infected cells and some tumor cells by releasing cytotoxins. It is found in the bone marrow and spleen. Its cytotoxic activity is not antibody-dependent but is augmented by interferon. Compare killer cell, killer T cells. See also null cell. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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