Main Entry: do·nor

Pronunciation: \ˈdō-nər, -ˌnȯr\

Function: noun

Etymology: Middle English donoure, from Anglo-French doneur, from Latin donator, from donare

Date: 15th century

1 : one that gives, donates, or presents something
2 : one used as a source of biological material (as blood or an organ)
3 a : a compound capable of giving up a part (as an atom, chemical group, or subatomic particle) for combination with an acceptor b : an impurity added to a semiconductor to increase the number of mobile electrons