| NK cell | <haematology, immunology> A type of lymphocyte that attacks and destroys foreign, infected and cancerous cells. Natural killer cells are not targeted at specific antigens the way cytotoxic T lymphocytes are. (14 Oct 1997) |
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| NK cells | Large granular lymphocytes which do not express markers of either T or B-cell lineage. These cells do possess Fc receptors for IgG and can kill target cells using antibody-dependent cell-mediated cytotoxicity. NK cells can also use perforin to kill cells in the absence of antibody. Killing may occur without previous sensitization. Synonym: NK cells. (05 Mar 2000) |
| nkat | <abbreviation> Nanokatal. (05 Mar 2000) |
| NKSF | <abbreviation> Natural killer cell stimulating factor. (05 Mar 2000) |