allograft (homograft) A graft of tissue from a donor of one genotype to a host of a different genotype but of the same species. If the donor and recipient are not closely related, the graft is likely to be rejected. If the graft takes place from one part to another part of the same individual it is called an autograft.

allograft A graft of tissue from a donor of one genotype to a host of a different genotype but of the same species. If the graft takes place from one part to another part of the same individual it is called an autograft.

allograft (al-oh-grahft) n. a living tissue or organ graft between two members of the same species. Unless the graft is from an identical twin, it will not survive unless the recipient is treated to suppress the body's immune response to the foreign tissue.

allograft See graft.