What is "euphoniums"

Usage examples of "euphoniums".

Their natural instinct was to tread quietly and stealthily in pursuit of their quarry, though, as they were simply walking through a recorded Informational Illusion, they could as easily have been wearing euphoniums and woad for all the notice their quarry would have taken of them.

There were six or seven cornets, three tenor horns, two tubas, two trombones and two euphoniums, the sun glittering and flashing on their honey-colored tubes and stops.