1. (initialism) .  (automotive) '''A'''nti-lock '''b'''raking '''s'''ystem.
  2. (initialism) .  (organic compounds) '''A'''crylonitrile '''b'''utadiene '''s'''tyrene.
  3. (initialism) .  (informal, plumbing) '''A'''ll-'''b'''lack '''s'''tuff, i.e., acrylonitrile butadiene styrene, referring to the black color of the waste water plumbing pipes composed of this plastic.
  4. Noun.  (informal) The abdominal muscles. (plural of, ab) .
  5. Noun.  (mathematics) Abbreviated form of the absolute value function.

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This entry was last updated on RefTopia from its source on 3/20/2012.