a raised molding, especially one having flat edges and a raised center, for framing a panel, doorway, fireplace, etc.
a stepped moulding covering and projecting beyond the joint between two members having surfaces at different levels
[C18: of unknown origin]
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
The hall mantlepiece is comprised of bolection molding with mitered returns.
The limestone bolection archi trave is capped by a panelled frieze and interrupted by a decorative key stone.
There is also a hole in the bolection molding around the basin, located at the intersection of each side.