xenotransplantation
Concise Oxford English Dictionary © 2008 Oxford University Press:
xenotransplantation/ziːnəʊtransplɑːnˈteɪʃn/
▶noun the process of grafting or transplanting organs or tissues between members of different species.
– derivatives
xenotransplant noun.
xenotransplant noun.
'xenotransplantation' also found in these Oxford entries:

