Definition of natural killer cell in English:

natural killer cell

Syllabification: nat·u·ral kill·er cell

noun

Medicine
  • A lymphocyte able to bind to certain tumor cells and virus-infected cells without the stimulation of antigens, and kill them by the insertion of granules containing perforin.
    More example sentences
    • Animal studies indicate that it enhances the immune system by stimulating natural killer cells and T cells, and by decreasing cancerous tumor's size.
    • These cytokines recruit and activate neutrophils, lymphocytes, macrophages, eosinophils, and natural killer cells at the site of infection.
    • However, these lymphocytes have very few natural killer cells and low antitumor cytolytic activity.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody