AB
     n 1: the blood group whose red cells carry both the A and B
          antigens [syn: {type AB}, {group AB}]
     2: a bachelor's degree in arts and sciences [syn: {Bachelor of  Arts}, {BA}, {Artium Baccalaurens}]
     3: the eleventh month of the civil year; the fifth month of the
        ecclesiastical year in the Jewish calendar (in July and
        August) [syn: {Av}]
     4: the muscles of the abdomen [syn: {abdominal}, {abdominal  muscle}]