bombardon
/bɑmˈbɑrdən/
noun
- A large brass musical instrument that produces very low, deep sounds, similar to a tuba.
- He struggled to carry the heavy bombardon onto the stage for the concert.
- In the marching band, the bombardon player stood at the back because of the instrument's size.
- The orchestra's bombardon added a rich, rumbling bass to the symphony.
Synonyms