A
K cell (aka
killer cell) is a
lymphocyte[?] with
immunoglobulin Fc receptors, which allow it to bind to and kill
antibody-coated cells by
antibody-dependent cell-mediated cytotoxicity[?] (ADCC). Once bound the cells act like
T cells and "program" the target cell to "self-destruct" by
apoptosis.
K cells are probably a sub-set of NK cells.