Cornet (noun)

1. A brass musical instrument that is similar to a trumpet but has a slightly smaller and more conical bore, and a slightly more mellow tone.
2. A brass instrument of the trumpet family, similar to but smaller than a trumpet and having a mellower tone.

Origin:

From the latin word "cornus" meaning "horn" and the diminutive suffix "-et" meaning "small".

Examples:

1. He played the cornet in the school band.
2. She was a professional cornet player and had performed in many orchestras.
3. The cornet has a slightly smaller and more conical bore than a trumpet.
4. The cornet has a mellower tone than a trumpet.
5. The cornet is a brass instrument that is similar to a trumpet but smaller.