sousaphone Hear it!

sousaphone Definition

☆ sousa·phone (so̵̅o̅′zə fōn′, so̵̅o̅′sə-)

noun

a brass instrument of the tuba family, with a large, movable bell: it was developed from the helicon and is used esp. in military bands

Etymology: after John Philip Sousa, who suggested its form