The continuous convex curves or reeding on metalwork, also used on furniture and ceramics. Gadrooned borders are made up of interlocking, repeated common bosses, the resulting effect producing a circle that appears to be in motion. Some european tin-glaze earthenwares have painted gadroon borders known as false gadrooning, that attempt to produce a... Found on http://www.antique-marks.com/antique-terms-g.html
A gadroon or godroon is a moulding composed of a series of convex flutes and curves joined to form a decorative pattern, used especially as an edge to silver articles. Found on http://www.probertencyclopaedia.com/browse/AG.HTM