Cornet-à-piston /(k?r"n?t-?-p?s"t?n; F. k?r`n?`?p?s`t?n")/

Cor·net-à-pis·ton

Cornet-à-piston

n.

pl. Cornets-à-piston

  1. A brass wind instrument, like the trumpet, furnished with valves moved by small pistons or sliding rods; a cornopean; a cornet. (Mus.)