n. a classification of blood based on the antigens present or absent in red blood cells. Although there may be 30 human blood group systems in all, there are four which are universally-recognized, namely Types A, B, AB, and O. Also called blood type.

BLOOD GROUP: "A blood group or blood type is named after the antigen present or absent in RBCs."
Cite this page: N., Pam M.S., "BLOOD GROUP," in, April 7, 2013, (accessed October 21, 2021).