A person who donates something, especially money to a fund or charity
an anonymous donor
A person who gives blood for transfusion
A card which a person carries to indicate consent to the use of their organs for transplant surgery in the event of their death
A person who donates an organ or organs from their body for transplantation
A lessening of public willingness to respond generously to charitable appeals, resulting from the frequency of such appeals
A person who provides a kidney for transplantation
A substance or species which is able to supply protons; a protogenic species.
An atom, molecule, etc., which can donate electrons to an electron acceptor.
A person of blood group O, who can in theory donate blood to recipients of any ABO blood group