The Collaborative International Dictionary of English v.0.48:

Mozetta \Mo*zet"ta\, Mozzetta \Moz*zet"ta\, n. [It. mozzetta:
   cf. F. mosette. Cf. Amice a hood or cape.] (Eccl.)
   A cape, with a small hood; -- worn by the pope and other
   dignitaries of the Roman Catholic Church.
   [1913 Webster]