people - (plural) any group of human beings (men or women or children) collectively; "old people"; "there were at least 200 people in the audience"

A, group A, type A - the blood group whose red cells carry the A antigen

B, group B, type B - the blood group whose red cells carry the B antigen

AB, group AB, type AB - the blood group whose red cells carry both the A and B antigens

group O, O, type O - the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors"

Rh positive, Rh-positive blood type - the blood group (approximately 85% of people) whose red cells have the Rh factor (Rh antigen)

Rh negative, Rh-negative blood, Rh-negative blood type - the blood group whose red cells lack the Rh factor (Rh antigen)