ritornello

noun, plural ri·tor·nel·los, ri·tor·nel·li [rit-er-nel-ee; Italian ree-tawr–nel-lee] /ˌrɪt ərˈnɛl i; Italian ˌri tɔrˈnɛl li/. Music.

1. an orchestral interlude between arias, scenes, or acts in 17th-century opera.
2. a tutti section in a concerto grosso, aria, etc.

noun plural -los or -li (-liː) music

1. an orchestral passage between verses of an aria or song
2. a ripieno passage in a concerto grosso