Sousaphone (noun)

1. A large brass musical instrument similar to a tuba, used primarily in marching bands.
2. A type of tuba that is bent in a circle to fit around the body, often used in marching bands.

Origin:

Early 20th century: named after john philip sousa (1854–1932), the american bandmaster who used it in his concerts.

Examples:

1. The sousaphone player marched with the rest of the band, playing a booming bass line.
2. The sousaphone provided the deep, powerful sound that was a staple of marching band music.
3. The sousaphone was invented as a way to make the tuba more portable for marching bands.
4. The sousaphone was much easier to carry than the traditional tuba, making it ideal for marching bands.
5. The sousaphone was the largest and loudest instrument in the marching band, capable of filling a football stadium with sound.