
• (n.) A work of sculpture of the above character. See Alto-rilievo. • (n.) Half relief; sculpture in relief of which the figures project from the background by one half their full roundness.
Found on
http://thinkexist.com/dictionary/meaning/demi-rilievo/

Dem'i-ri·lie'vo noun [ Prefix demi- + Italian rilievo .] (Fine Arts) (a) Half relief; sculpture in relief of which the figures project from the background by one half their full roundness. (b) A work of sculpture of the above character. See Alto-rilievo
Found on
http://www.encyclo.co.uk/webster/D/32

In sculpture, demi-rilievo describes a half-relief, or the condition of a figure when it rises from the plane as if it had been cut in two and only one half fixed to the plane.
Found on
http://www.probertencyclopaedia.com/browse/AD.HTM
No exact match found.