Libretto
Pronunciation : Li*bret"to, n.; pl. E. Librettos
Part of Speech : It.
Etymology : [It., dim. of libro book, L. liber. See Libel.] (Mus.) (a) A book containing the words of an opera or extended piece of music. (b) The words themselves.
Definition :
Libretti.
Source : Webster's Unabridged Dictionary, 1913