Emily Dickinson Lexicon

CAV'E-ZON, or CAV'ES-SON, n. [Fr. caveçon, or cavesson; It. cavezzone, a muzzle for a horse, from cavare, to draw.]

A sort of nose-band, of iron, leather or wood, sometimes flat, and sometimes hollow or twisted, which is put on the nose of a horse to wring it, and thus to forward the suppling and breaking of him. – Farrur's Dict.