cornet-a-piston
Cor"net-à-pis`ton (kr"nt--ps"tn; F. kr`n`ps`tn"), n.; pl. Cornets-à- piston. Etym: [F.] (Mus.) Defn: A brass wind instrument, like the trumpet, furnished with valves moved by small pistons or sliding rods; a cornopean; a cornet.
Cor"net-à-pis`ton (kr"nt--ps"tn; F. kr`n`ps`tn"), n.; pl. Cornets-à- piston. Etym: [F.] (Mus.) Defn: A brass wind instrument, like the trumpet, furnished with valves moved by small pistons or sliding rods; a cornopean; a cornet.