| 释义 |
do·nor
\ˈdōnə(r) also ˈdōˌnȯ(ə)r or ˈdōˌnȯ(ə) sometimes ˈdänə(r) or dōˈnȯ-\ noun
(-s)
Etymology: Middle French doneur, from Latin donator — more at donator
1. : one that gives, donates, or presents
< a donor of funds to research foundations >
< a list of paintings and the donors >
a. : one that confers a power for execution — opposed to donee
b. : one used as a source of biological material
< a donor of blood for transfusion >
< a donor of a chromosome complex to a hybrid >
< a donor of a tissue for transplantation >
2. chemistry : a substance capable of giving up part of itself (as an atom, radical, or elementary particle) for combination with another substance
< water may act as a hydrogen donor >
< adenosine triphosphate is a phosphate donor >
< an amine with its unshared electrons is an electron donor >
— compare acceptor 3
3. : an impurity that yields a limited supply of mobile electrons that contribute to the conductivity of a semiconducting material — compare acceptor 4c |