flu·gel·horn or flue·gel·horn (flōō'gəl-hôrn') n. A bugle with valves, similar to the cornet but having a wider bore.
[German Flügelhorn : Flügel, flank (from its use to summon flanks during a battle) (from Middle High German vlügel, wing, flank; see pleu- in Indo-European roots) + Horn, horn (from Middle High German, from Old High German; see ker-1 in Indo-European roots).] flü'gel·horn'ist n.