This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A large brass wind instrument, similar in range to the tuba, having a flaring bell and a shape adapted to being carried in marching bands.

n. A valved brass instrument with the same length as a tuba, but shaped differently so that the bell is above the head, that the valves are situated directly in front of the musical instruments and a few inches above the waist, and that most of the weight rests on one shoulder.

n. the lowest brass wind instrument

"It comprises Tom Hagerman, who doubles on violin and keys, including accordion; Shawn King on percussion; and Jeanie Schroder, who holds down the bottom on upright bass and sousaphone."

brass instrument    bass    brass   

helicon    euphonium    bombardon   

sousaphonist