What is the meaning of Blood_type?

Any classification of human blood by the presence or absence of various antigens in a person’s red blood cells.

  1. One of eight possible classifications within the ABO and Rh blood group systems, commonly used to determine a person's compatibility for blood transfusion.

One of eight possible classifications within the ABO and Rh blood group systems, commonly used to determine a person's compatibility for blood transfusion.

Source: wiktionary.org