Definition of interleukin-2
: an interleukin produced by antigen-stimulated helper T cells in the presence of interleukin-1 that induces proliferation of immune cells (such as T cells and B cells) and is used experimentally especially in treating certain cancers
—abbreviation IL-2
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Merriam-Webster unabridged
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The first known use of interleukin-2 was in 1979
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