(kôr·net′ for def. 1; kôr′nit for defs. 2 and 3)
1. A small wind instrument of the trumpet class, in which the notes are determined by valves or pistons that open communication into auxiliary bands of tubing, thus varying the length of the vibrating air column.
2. A cone–shaped paper wrapper.
3. A portion of a woman's headdress, of varying shape, from the 14th to the 17th century; also, the headdress itself; also, the tall white headdress of the Sisters of Charity. [<OF, dim. of corn <L cornu a horn]
—cor·net′tist or cor·net′ist noun
CORNET
(def. 3)

(kôr′nit) noun
1. Formerly, the lowest commissioned cavalry officer in the British army, or a pennant carried by him.
2. A flag or standard; specifically, a signaling flag. [<F, dim. of corne <L cornu horn]