n : an interleukin produced esp. by monocytes and macrophages that regulates cell-mediated and humoral immune responses by activating lymphocytes and mediates other biological processes (as the onset of fever) usu. associated with infection and inflammation - abbr. IL-1 .
Similar sounding terms: in·ter·leu·kin interleukin-6 interleukin-3 interleukin-2
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