One of the mysteries of the English language finally explained.
A white blood cell (a type of lymphocyte) which destroys infected or cancerous cells.
- ‘Researchers believe that gray cells may be a primitive form of our immune system's human killer cells.’
- ‘Natural killer cells are continually poised to attack if a virus strikes.’
- ‘So they basically give out signals to an infantry, which in this case would be the killer cells that engage the virus in infected individuals, and help to set up this co-ordinated defence.’
- ‘The metaphors used for cancer are often military terms such as war on cancer, killer cells, magic bullets, and the need for patients to adopt a fighting spirit.’
- ‘The thinking which lies behind much of the new work is that killer cells in the immune system can be trained to attack malignant tumours when they wouldn't otherwise.’
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