This is the 7554th most frequent Russian word.
донор
Donor.
Here, 'донор' refers to an individual who donates blood for medical purposes.
Донор крови пришёл в больницу, чтобы сдать кровь.
The blood donor came to the hospital to donate blood.
In this case, 'донор' refers to a sponsor who provides financial support.
Программа помощи предполагает привлечение финансового донора.
The aid program involves attracting a financial donor.
Here, 'донор' denotes an entity serving as the source of something, in this case, specimens or biological material.