saxtuba
/ˈsæksˌtuːbə/
noun
- A large brass musical instrument with a deep, rich sound, similar to a tuba but with a saxophone-like mouthpiece.
- He spent years learning to play the saxtuba for the marching band.
- The orchestra featured a rare saxtuba in the brass section.
- The saxtuba's warm tone added a unique depth to the symphony.