noun ar·ro·ba \ə-ˈrō-bə\

Definition of arroba

  1. 1 :  an old Spanish unit of weight equal to about 25 pounds

  2. 2 :  an old Portuguese unit of weight equal to about 32 pounds

Origin and Etymology of arroba

Spanish & Portuguese, from Arabic al-rubʽ, literally, the quarter

First Known Use: 1555

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