ar·co | \ˈär-(ˌ)kō \

Definition of arco 

: with the bow usually used as a direction in music for players of stringed instruments — compare pizzicato

First Known Use of arco

1806, in the meaning defined above

History and Etymology for arco

Italian, from arco bow, from Latin arcus — more at arrow

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The first known use of arco was in 1806

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one that holds something together

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