A circular ornament, often decorated with sculptural reliefs or glazed terracotta.
In heraldry - a disc, the name of which varies according to its tincture.
This is one of a series of specialised Latin terms that have developed since the 12th century AD to describe different elements of coats of arms commonly used in heraldry.
Roman mount, or roundel, probably portraying Silenus from Besthorpe. (© NCC)