Found 2 items, similar to Universal donor.
English → English (WordNet) Definition: universal donor universal donor n : a person whose type O Rh-negative blood may be safely transfused into persons with other blood types
English → English (gcide) Definition: Universal donor Universal donor \U`ni*ver“sal do”nor\, n. (Med.) a person belonging to the O blood group (of the ABO classification), who can safely donate blood to anyone. [PJC]