trombone
trom.bone \tra:m-'bo-n, (.)tr*m-', 'tra:m-.\ \-*st\ n [It, aug. of tromba trumpet, of Gmc origin; akin to OHG trumba, ]trumpa trumpet : a brass wind instrument that has a cupped mouthpiece, that consists of a long cylindrical metal tube bent twice upon itself and ending in a bell and that has a movable slide with which to vary the pitch - trom.bon.ist n