A narrow board, usually thicker at one edge than the other, used as siding for houses and similar structures of frame construction.
A clapper board; a device used in film production, having hinged boards that are brought together with a clap, used to synchronize picture and sound at the start of each take of a motion picture or other video production.
Such boards, arranged horizontally and overlapping with thick edge down, collectively, as siding.
To cover with clapboards.
Any flat, thin piece of clay, ivory, metal, etc., used for ornament, or for painting pictures upon, as a dish, plate, slab, etc., hung upon a wall; also, a smaller decoration worn by a person, such as a brooch.
A small card representing an amount of money, used for betting in casinos; a sort of gaming chip.
A clearing in a bacterial lawn caused by a virus.
An accumulation of biofilm, or bacteria, on teeth, which may develop into dental calculus (tartar).
A deposit of beta-amyloid protein occurring in a nerve cell and associated with Alzheimer's disease.
A broad patch of abnormal tissue distinguishable from surrounding tissue, especially a broad papule (“inflamed, irritated patch”) on the skin.
A piece of flat metal with writing on it, attached to a building, monument, or other structure to remind people of a person or an event.
In the Hornbostel–Sachs classification system: any flat, thin musical instrument.
An abnormal accumulation of material in or on an organ of the body, often associated with disease.
An accumulation in artery walls made up of macrophage cells and debris containing lipids, (cholesterol and fatty acids), calcium, and connective tissue; an atheroma.