burletta

from The Collaborative International Dictionary of English v.0.48

Burletta \Bur*let"ta\ (b[^u]r*l[e^]t"t[.a]), n. [It., dim. of
   burla mockery. See {Burlesque}, a.] (Mus.)
   A comic operetta; a music farce. --Byron.
   [1913 Webster]