1. Av.


  1. Chemistry. alabamine.
  2. Immunology. antibody.

  1. Nautical. able seaman.
  2. airborne.
  3. U.S. Air Force. Airman Basic.
  4. Alberta, Canada (approved for postal use).
  5. antiballistic; antiballistic missile.

Symbol, Physiology.

  1. a major blood group usually enabling a person whose blood is of this type to donate blood to persons of type AB and to receive blood from persons of type O, A, B, or AB.

plural noun Informal.

  1. abdominal muscles.

  1. about.
  2. Baseball. (times) at bat.

  1. a formal element occurring in loanwords from Latin, where it meant “away from”: abdicate; abolition.

  1. Bachelor of Arts.

  1. Nautical. able seaman.
  2. Baseball. (times) at bat.Also a.b.


  1. a variant of Av

abbreviation for

  1. Also: a.b. able-bodied seaman
  2. (in the US) Bachelor of Arts
  3. (esp in postal addresses) Alberta (Canada)

symbol for

  1. a human blood type of the ABO group, containing both the A antigen and the B antigen


  1. away from; off; outside of; opposite toabnormal; abaxial; aboral


  1. denoting a cgs unit of measurement in the electromagnetic systemabvolt

pl n

  1. informal abdominal muscles

abbreviation for

  1. acrylonitrile-butadiene-styrene: any of a range of tough copolymers used esp for making moulded articles

word-forming element meaning “away, from, from off, down;” from Latin ab-, ab “off, away from,” from PIE root *apo- (see apo-). Reduced to a- before -m-, -p-, or -v-; sometimes abs- before -c- or -t-.


colloquial shortening of abdominals, by 1992.


  1. antibody
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