Narrow board tapered toward one edge, used as siding to cover the exterior of a framed building. Clapboards are attached horizontally, each overlapping the next one down. Cleft oak clapboard was introduced to New England in the 17th century; later materials included pine, cypress, and cedar.
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A beveled edge refers to an edge of a structure that is not perpendicular (but instead often at 45 degrees) to the faces of the piece. The words bevel and chamfer overlap in usage; in general usage they are often interchanged, while in technical usage they may sometimes be differentiated as shown in the image at right.
The bevel is a relatively common effect in graphic editors such as Photoshop. As such, it is in widespread usage in mainstream logos and archetypes.
Bevel when mentioned in the same context with boxes and squares in design refers to a raised effect, and not as commonly mistaken for rounded corners.
Beveled edges are a common aesthetic nicety added to window panes and mirrors.