The Collaborative International Dictionary of English v.0.48:

Intaglio \In*tagl"io\, n.; pl. E. Intaglius, It. Intagli.
   [It., fr. intagliare to engrave, carve; pref. in- in +
   tagliare to cut, carve. See Detail.]
   A cutting or engraving; a figure cut into something, as a
   gem, so as to make a design depressed below the surface of
   the material; hence, anything so carved or impressed, as a
   gem, matrix, etc.; -- opposed to cameo. Also used
   adjectively.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intaglio
    n 1: a printing process that uses an etched or engraved plate;
         the plate is smeared with ink and wiped clean, then the ink
         left in the recesses makes the print [syn: intaglio
         printing, intaglio, gravure]
    2: glyptic art consisting of a sunken or depressed engraving or
       carving on a stone or gem (as opposed to cameo) [syn:
       intaglio, diaglyph]