Noun
See Duet.
Source: Webster's dictionaryDuring Rossini 's stay in London in the summer of 1824, he composed his Duetto for cello and double bass for Dragonetti and the cellist David Salomons. Source: Internet
Even more outrageous was a solo piece Duetto Amoroso, in which the sighs and groans of lovers were intimately depicted on the violin. Source: Internet
There survives a manuscript of the Duetto, which has been recorded. Source: Internet