- A person from whom blood, tissue, or an organ is taken for transplantation.
- A compound that will transfer an atom or a radical to an acceptor; methionine is a methyl donor; glutathione is a glutamyl donor.
- An atom that readily yields electrons to an acceptor, nitrogen, which will donate both electrons to a shared pool in forming a coordinate bond.
[L. dono, pp. donatus, to donate, to give]
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Examples: glitazone, GI cocktail, etc.