There are four possible combinations of blood types namely: Type A (only antigen A), Type B (only antigen B), Type AB (both antigens A and B), and Type O (neither antigens A nor B). This is referred to as the ABO blood typing system. In addition, red blood cells have a Rhesus factor or Rh, which is either present or absent. If the Rh factor is present, the cells are referred to as Rh positive.
Looking for the definition of DFAC? Find out what is the full meaning of DFAC on Abbreviations.com! 'Dining Facilities Administration Center' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource.
1 DoD civilians authorized to dine at DFAC, effective Aug. 15 August 12, 2016. 2  Expert: 'Persistence and patience' essential in the federal hiring process August 12, 2016.  Help with public transportation options on the horizon for JBM-HH commuters August 12, 2016.