noun
universal blood donor; universal donor
Medical term for a person with O negative blood type, whose red blood cells can be transfused into any recipient.
O型のRhマイナスの人は万能供血者と呼ばれる。
People with type O Rh-negative blood are called universal donors.
Refers to a universal recipient (AB positive blood type), the opposite of a universal donor.
Compound of 万能 (universal) + 供血 (blood donation) + 者 (person).