sinfonietta
symphony that is smaller in scale (either in terms of length or the instrumental forces required), or lighter in approach than a standard symphony
en-US/ˌsɪnfəˈnjɛdə/
en-GB/sɪnˈfəʊnɪˈɛtə/
symphony that is smaller in scale (either in terms of length or the instrumental forces required), or lighter in approach than a standard symphony