Ar*ro"ba (#), n. [Sp. and Pg., from Ar. arrub, ar-rubu, a fourth part.]
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.
A Spanish liquid measure for wine = 3.54 imp. gallons, and for oil = 2.78 imp. gallons.
© Webster 1913.
Editor's note: the symbol for arroba is @.