flugelhorn -
A brassinstrument resembling a cornet but with a wider, conical bore, and usually with three valves, in the same B-flat pitch as many trumpets and cornets but with a more deeply conical mouthpiece than those. A bugle with valves.
OmegaWiki Dictionary
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flugelhorn A copper wind instrument in b flat or e flat, or sporadically also in C with three valves, which is an important instrument in brass bands.
