The Collaborative International Dictionary
Bass horn
Bass horn \Bass" horn"\ (Mus.) A modification of the bassoon, much deeper in tone.
Wiktionary
bass horn
n. A large brass instrument in the bass range, usually referring to the modern tuba or the archaic serpent
WordNet
bass horn
n. the lowest brass wind instrument [syn: sousaphone, tuba]
Usage examples of "bass horn".
Rodgers reached the prison section even as they heard the bass horn roar of the Tomahawk racing toward the cave.
A lone trumpet began to ride high upon the song, higher yet, impossibly treble above the singing, while some bass horn or some great stone windpipe blew notes almost below their hearing so that the ground trembled with it.