group O - the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors"type O, Oblood group, blood type - human blood cells (usually just the red blood cells) that have the same antigens
group O
noun
Synonyms for group O
noun the blood group whose red cells carry neither the A nor B antigens
group O - the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors"