ar·ro·ba /əˈrobə/
  Ar·ro·ba n.
  1. A Spanish weight used in Mexico and South America = 25.36 lbs. avoir.; also, an old Portuguese weight, used in Brazil = 32.38 lbs. avoir.
  2. A Spanish liquid measure for wine = 3.54 imp. gallons, and for oil = 2.78 imp. gallons.
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  arroba
       n 1: a unit of weight used in some Spanish speaking countries
       2: a liquid measure (with different values) used in some
          Spanish speaking countries