A bugle with valves, similar to the cornet but having a wider bore.
ETYMOLOGY:
German Flügelhorn : Flügel, flank (from its use to summon flanks during a battle) (from Middle High German vlügel, wing, flank; see pleu- in Appendix I) + Horn, horn (from Middle High German, from Old High German; see ker-1 in Appendix I).