noun
septet
sep-TET/sepˈtet/
A group of seven related members.
The chamber septet brings together seven musicians with different instruments.

Etymology
A Septett was a musical work for seven voices or instruments. The meaning broadened from the composition to a company or group of seven, retaining its strong musical association.
More examples
- The septet's seven singers rehearse every Tuesday.
- A septet of paintings shows the same garden in different seasons.
- Two brass septets perform at the festival.
Forms
septet · septets