arroba

‖n. [ Sp. and Pg., from Ar. arrub, ar-rubu, a fourth part. ] 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. [ 1913 Webster ]

2. A Spanish liquid measure for wine = 3.54 imp. gallons, and for oil = 2.78 imp. gallons. [ 1913 Webster ]