Noun
Wagner tuba (plural Wagner tubas)
(music) A brass instrument that combines tonal elements of the French horn and the trombone.
Related horns main The variety in horn history necessitates consideration of the natural horn, Vienna horn, mellophone, marching horn, and Wagner tuba. Source: Internet
Wagner tuba main The Wagner tuba is a rare brass instrument that is essentially a horn modified to have a larger bell throat and a vertical bell. Source: Internet