antithymocyte globulin

noun

an·​ti·​thy·​mo·​cyte globulin -ˈthī-mə-ˌsīt- 

variants also anti-thymocyte globulin

: a mixture of usually IgG antibodies against human T cells that is derived from purified animal blood serum (as from a horse or rabbit) and is administered by intravenous injection especially to suppress immune system function (as to prevent rejection in kidney transplant)

The immunosuppressive induction protocol included intravenous antithymocyte globulin …

—Jean-Michel Dubernard, The New England Journal of Medicine