CORNET-À-PISTON

‖Cor″net–à–pis′ton (k?r″n?t–?–p?s″t?n; F. k?r′n?′?p?s′t?n″), n.; pl. Cornets-à-piston. [] (Mus.) A brass wind instrument, like the trumpet, furnished with valves moved by small pistons or sliding rods; a cornopean; a cornet.