Ab

(noun) a bachelor's degree in arts and sciences. Synonyms: Bachelor of Arts, BA, Artium Baccalaurens, AB.

(noun) the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August). Synonyms: Av.

(noun) the muscles of the abdomen. Synonyms: abdominal, abdominal muscle, ab.

(noun) the blood group whose red cells carry both the A and B antigens. Synonyms: AB, type AB, group AB.