ca·ba·let·ta (kāb'ə-lět'ə, kä'bə-) n.
pl.ca·ba·let·tas or ca·ba·let·te (-lět'ē)
A short aria that has a repetitive rhythm and a simple style.
The final section of an aria or duet marked by a quick uniform rhythm.
Something likened to such a short aria or a final section of a piece: "And a chronic chorus of cascades and birds/Cuts loose in a wild cabaletta"(W.H. Auden).
[Italian, alteration of coboletta, stanza, diminutive of cobola, cobla, from Old Provençal cobla, from Latin cōpula, link.]