تعريف universal donor في الإنجليزية الإنجليزية القاموس.
A person with blood type o, which lacks antigens, and is therefore compatible with all other blood types, allowing such person to donate blood to any other person
a person whose type O Rh-negative blood may be safely transfused into persons with other blood types
A person who has group O blood and is therefore able to serve as a donor to a person of any other blood group in the ABO system