sin·fo·niet·ta 
(sĭn′fə-nyĕtə, -fō-)
(sĭn′fə-nyĕtə, -fō-)n.
1. A symphony that is shorter than usual or requires fewer instruments than usual.
2. A small symphony orchestra, especially one consisting of stringed instruments only.
[Italian, diminutive of sinfonia, sinfonia; see SINFONIA.]