The cornet is a brass instrument very similar to the trumpet, distinguished by its conical bore, compact shape, and mellower tone quality. The most common cornet is a transposing instrument in B♭. It is not related to the medieval cornett or cornetto. The cornet was originally derived from the post horn. Sometimes it is called a cornopean, which refers to the earliest cornets with the Stölzel valve system.
GalleriesBrass Musical Instruments
Encyclopaedia Britannica (11th ed., vol. 7) (New York, NY: The Encyclopaedia Britannica Company, 1910)