improvisatore

from The Collaborative International Dictionary of English v.0.48

Improvvisatore \Im`prov*vi`sa*to"re\, n.; pl. {Improvvisatori}.
   [It. See {Improvise}.]
   One who composes and sings or recites rhymes and short poems
   extemporaneously. [Written also {improvisatore}.]
   [1913 Webster]