The Collaborative International Dictionary of English v.0.48:

Rilievo \Ri*lie"vo\, n.[It. See Relief.] (Sculp. & Arch.)
   Same as Relief, n., 5.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rilievo
    n 1: sculpture consisting of shapes carved on a surface so as to
         stand out from the surrounding background [syn: relief,
         relievo, rilievo, embossment, sculptural relief]