Definition

1. Noun:
   • The blood group whose red cells carry both the A and B antigens: In medicine and biology, "ab" refers to a specific blood type in the ABO system.
   • The muscles of the abdomen: In informal or fitness contexts, "ab" is a common short form for the abdominal muscles.
   • The eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August): In the context of the Hebrew calendar, "Ab" (often capitalized) is the name of a month.
   • A bachelor's degree in arts and sciences: An informal abbreviation for a Bachelor of Arts (B.A.) or Bachelor of Science (B.S.) degree.

Usage Examples

• Noun (Blood Group):
  • Her blood type is AB, which is relatively rare.
  • Patients with type AB blood can receive red blood cells from any ABO type.
• Noun (Abdominal Muscles):
  • He does sit-ups every day to strengthen his abs.
  • A strong core starts with well-developed abs.
• Noun (Hebrew Month):
  • The fast of Tisha B'Av occurs in the month of Ab.
• Noun (Academic Degree):
  • She earned her AB from a prestigious university.

Advanced Usage

• "AB negative/positive": Specifying the Rh factor of the AB blood type.
  • The donor must have AB positive blood for this procedure.
• "Six-pack abs": A colloquial term for a well-defined set of abdominal muscles.
  • The athlete is famous for his six-pack abs.

Variants and Related Words

• ABO: The full name of the blood group system (e.g., ABO blood group system).
• Abdomen: The full term for the body part containing the abdominal muscles.
• Abdominal: The adjective form (e.g., abdominal pain, abdominal muscles).
• B.A.: Bachelor of Arts, a formal equivalent for the academic degree.
• B.S.: Bachelor of Science, a formal equivalent for the academic degree.

Synonyms

• Blood type AB: For the blood group meaning.
• Core muscles / Midsection: For the abdominal muscles meaning (though these are broader terms).
• Av: An alternate transliteration for the Hebrew month.
• Bachelor's degree: For the academic meaning.

Related Phrases

• AB donor/recipient: Phrases used in medical contexts regarding blood transfusion compatibility.
  • An AB positive individual is a universal plasma donor.
• Work on your abs: A common fitness instruction.
  • The trainer told the class to work on their abs during the cool-down.

Noun

1. the blood group whose red cells carry both the A and B antigens
2. the muscles of the abdomen
3. the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
4. a bachelor's degree in arts and sciences