A person who donates an organ or tissue while alive. (Organdonor.gov April 2020)
A living person who donates an organ for transplantation, such as a kidney or a segment of the lung, liver, pancreas, or intestine. Living donors may be blood relatives, emotionally related individuals, or altruistic strangers. These may also include domino heart or liver transplants. See Domino Transplant. (OPTN Glossary May 2021)
A living individual from whom at least one organ is recovered for transplantation. (OPTN Policy Definitions May 2021)