<unk>  (allo- from the Greek meaning "other") is the transplantation of cells, tissues, or organs, sourced from a genetically non-identical member of the same species as the recipient.. The transplant is called an allograft or allogeneic transplant or homograft. Most human tissue and organ transplants are allografts.
In contrast, a transplant from another species is called a xenograft. A transplanted organ or tissue from a genetically identical donor, i.e., an identical twin, is termed an isograft.  Finally, when a tissue is transplanted from one site to another on the same patient, it is termed an autograft.
When a host mounts an immune response against an allograft or xenograft, the process is termed rejection. An allogenic bone marrow transplant can result in an immune attack against recipient, termed Graft-versus-host disease.
Allotransplantation
Autotransplantation
Allograft
Medical grafting
Implantation
Skin grafting
Homostatic graft
Foreskin restoration