What is the meaning of the furniture term Quirk?

In furniture terminology, the term quirk refers to a small groove or channel that is typically found on the edge or surface of a piece of furniture. It is often decorative in nature and may be found on various types of furniture, such as tables, cabinets, or chair legs. The quirk can be plain or ornamental, serving to add visual interest and detail to the furniture piece. Narrow groove molding, a sunken fillet or channel.