Half Relief. A type of raised relief midway between low and high; otherwise called medium relief. The relief projects moderately from the background with extensive undercutting. Some plaques found in numismatics are cast of this relief. See relief.
excerpted with permission from
An Encyclopedia of Coin and Medal Technology
For Artists, Makers, Collectors and Curators
COMPILED AND WRITTEN BY D. WAYNE JOHNSON
Roger W. Burdette, Editor