Emily Dickinson Lexicon

CORN'ET, n. [Fr. cornet, cornette; It. cornetta, cornetto; Sp. corneta, from L. cornu, a horn. See Horn.]

1. An instrument of music, in the nature of a trumpet, sounded by blowing with the mouth. It was of a winding shape like a horn; used in armies and on occasions of joy. David played before the Lord on cornets. – 2 Sam. vi.
2. In modern usage, an officer of cavalry, who bears the ensign or colors of a troop. He is the third officer in the company. – Encyc.
3. A company of cavalry; a troop of horse. [Not used.] – Clarendon. Bacon.
4. The cornet of a horse [coronet] is the lowest part of his pastern, that runs round the coffin and is distinguished by the hair that joins and covers the upper part of the hoof. – Farrier's Dict.
5. A little cap of paper in which retailers inclose small wares.
6. A scarf anciently worn by doctors. – Dict.
7. A head-dress. – Dict.