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noun, Immunology.
any of several types of lymphocyte or leukocyte capable of destroying cells that have acquired foreign characteristics, as a tumor cell or virus-infected cell.
a type of white blood cell that is able to kill cells, such as cancer cells and cells infected with viruses

killer cell kill·er cell (kĭl’ər)
A large differentiated T cell that attacks and lyses target cells bearing specific antigens. Also called cytotoxic T cell, killer T cell, null cell.


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  • Killer-diller

    [kil-er-dil-er] /ˈkɪl ərˈdɪl ər/ noun, Older Slang. 1. (def 5).

  • Killer instinct

    noun an aggressive and ruthless determination to win or attain a goal

  • Killer micro

    [Popularised by Eugene Brooks] A microprocessor-based machine that infringes on mini, mainframe, or supercomputer performance turf. Often heard in “No one will survive the attack of the killer micros!”, the battle cry of the downsizers. Used especially of RISC architectures. The popularity of the phrase “attack of the killer micros” is doubtless reinforced by the […]

  • Killer poke

    A recipe for inducing hardware damage on a machine via insertion of invalid values (see poke) into a memory-mapped control register; used especially of various fairly well-known tricks on bitty boxes without hardware memory management (such as the IBM PC and Commodore PET) that can overload analog electronics in the monitor. See also HCF. (1994-11-04)

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