interleukin-2

noun

1. any of a closely related family of polypeptides, derived from many cell types, that stimulate several components of the inflammatory response, including fever; lymphocyte activating factor
   in full interleukin-1
2. a glycoprotein lymphocyte product that stimulates the growth of T cells and is used experimentally in cancer therapy; T cell growth factor
   in full interleukin-2