Pagliaci
Pagliaci is not a widely used term in English-language references. In many cases it appears as a misspelling or variant of Pagliacci, the title of Ruggero Leoncavallo's famous Italian opera first performed in 1892. The opera tells the story of Canio, the leader of a traveling commedia dell'arte troupe, whose wife’s infidelity leads to murder and tragedy. The title Pagliacci is Italian for “Clowns” and derives from pagliaccio, the singular for clown.
Linguistically, the standard Italian plural of pagliaccio is pagliacci. Because pagliaci does not conform to Italian
In reference works, the canonical form remains Pagliacci for the opera and for the general term clowns