What's the difference between cantabile and cavatina?

Cantabile

Definition:

• (a.) In a melodious, flowing style; in a singing style, as opposed to bravura, recitativo, or parlando.
• (n.) A piece or passage, whether vocal or instrumental, peculiarly adapted to singing; -- sometimes called cantilena.

Example Sentences:

Cavatina

Definition:

• (n.) Originally, a melody of simpler form than the aria; a song without a second part and a da capo; -- a term now variously and vaguely used.

Example Sentences: