Trombone

a large musical instrument of the trumpet kind. It has a long tube bent twice upon itself. One of the loops is double. The player slides it in and out to change the pitch of his notes. When the loop slides out the tube is lengthened and the note is lowered. The change of length covers a full octave. The tone of the trombone is rich and impressive. It is a favorite instrument in an orchestra or military band. See Orchestra