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]