- a sizable, valved, brass wind tool with a bass pitch; a tuba or a sousaphone.
- a guitar like the serpent but shaped like a bassoon, made use of mostly in military rings during the early 19th century.
- a big metal tool in bass range, generally discussing the present day tuba or even the archaic serpent
- the best brass wind tool
- A modification of bassoon, more deeply in tone.