A fluegelhorn is a three-valved brass instrument similar in size and shape to the trumpet but having a conical rather than a cylindrical bore and possessing a larger bell. Because of these differences the tone of the flugelhorn is mellower than that of the trumpet.
It is used traditionally in concert bands and has recently been used in jazz ensembles. It is very popular in European bands.
Information found at http://www.encyclopedia.com/html/f1/flugelho.asp
