The Collaborative International Dictionary of English v.0.48:

Embossment \Em*boss"ment\, n.
   1. The act of forming bosses or raised figures, or the state
      of being so formed.
      [1913 Webster]

   2. A bosslike prominence; figure in relief; raised work; jut;
      protuberance; esp., a combination of raised surfaces
      having a decorative effect. "The embossment of the
      figure." --Addison.
      [1913 Webster]

WordNet (r) 3.0 (2006):

embossment
    n 1: an impression produced by pressure or printing [syn:
         imprint, embossment]
    2: sculpture consisting of shapes carved on a surface so as to
       stand out from the surrounding background [syn: relief,
       relievo, rilievo, embossment, sculptural relief]