Moldingis a strip of material with various profiles used to cover transitions between surfaces or for decoration. It is traditionally made from solid milled wood or plaster but may be of plastic or reformed wood.
Common moldings include:
A "plain" molding has right-angled upper and lower edges. A "sprung" molding has upper and lower edges that bevel towards its rear, allowing mounting between two non-parallel planes (such as a wall and a ceiling), with open space behind.