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interleukin 1

[in-ter-loo-kin] /ˈɪn tərˌlu kɪn/
noun, Immunology
1.
any of several proteins released from certain cells, especially macrophages, and having various effects on the activity of other cells, as promoting inflammation or enhancing T-cell proliferation.
Abbreviation: IL-1.
Origin
1979
1979; inter- + leuk(ocyte) + -in2; so called because such proteins act as agents of communication between different populations of leukocytes
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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