Glossary of Terms,
Ogee: A molding with a cyma or S-shaped profile.
Ogive: A pointed arch, Gothic.
Onion Foot: An oval-shaped, bulbous foot suggesting a somewhat flattened onion.
Onlay: Overlay; decorative appliquÈ, as of veneers.
Orders: The orders of Architecture are the standardized ornamental types of columns. They are based on Greek and Roman remains. The three Greek orders are the Doric, Ionic, And Corinthian. The five Roman orders are the Tuscan, Doric, Ionic, Corinthian, and Composite.
Ormolu: From the French or moule; gilded or brass mounts for furniture or art objects.
Ottoman: An upholstered seat minus the arms and back, often used as a footstool from Turkish influence.
Oval Back: Chair shape, best developed by Hepplewhite after the French precedent.
Ovolo: Convex classical profile, usually the full quarter of a circle. When enriched with the egg-and-dart molding, it is known as "echinus."