Corni di basseto

from The Collaborative International Dictionary of English v.0.48

Corno di bassetto \Cor"no di bas*set"to\ (k?r"n? d? b?s-s?t"t?
   or b?s-s?t"t?); pl. {Corni di basseto}. [It.] (Mus.)
   A tenor clarinet; -- called also {basset horn}, and sometimes
   confounded with the English horn, which is a tenor oboe.
   [1913 Webster]