Flügelhorn (Ger.). Brass wind instr. with cup-shaped mouthpiece and wide conical bore. Bell held forward. Types are (1) sop. in E♭ (rare). (2) alto in B♭, same compass as cornet in B♭ but mellower in tone. (3) ten. in E♭ (sometimes called Altflügelhorn or Althorn) or sometimes in F. (2) is the type used in Brit. brass bands and sometimes in orch. comp., e.g. by Vaughan Williams in his 9th Sym. (1956–8). The posthorn solo in 3rd movt. of Mahler's 3rd Sym. is often played by a flügelhorn.

flu·gel·horn / ˈfloōgəlˌhôrn/ (also flü·gel·horn, flue·gel·horn) • n. a valved brass musical instrument like a cornet but with a mellower tone.