Medical Definition of interleukin–1
: an interleukin produced especially 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) usually associated with infection and inflammation—abbreviation IL-1
Seen and Heard
What made you want to look up interleukin–1? Please tell us where you read or heard it (including the quote, if possible).