arroba

noun
ar·ro·ba | \ə-ˈrō-bə \

Definition of arroba 

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

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

First Known Use of arroba

1555, in the meaning defined at sense 1

History and Etymology for arroba

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

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The first known use of arroba was in 1555

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