Noun
- 1. Bachelor of Arts, BA, Artium Baccalaurens, AB, bachelor's degree, baccalaureate
- usage: a bachelor's degree in arts and sciences
- 2. Ab, Av, Jewish calendar month
- usage: the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
- 3. abdominal, abdominal muscle, ab, skeletal muscle, striated muscle
- usage: the muscles of the abdomen
- 4. AB, type AB, group AB, blood group, blood type
- usage: the blood group whose red cells carry both the A and B antigens
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