Una baldosa es una losa o loseta manufacturada, fabricada en diferentes tipos y técnicas de cerámica, así como en piedra, caucho, corcho, vidrio, metal, plástico, etc. Primitivamente se llamó baldosa al ladrillo cuadrado y fino, de forma rectangular ó poligonal y de distintos tamaños, usado para pavimentos. En arqueología se define como ladrillo poco grueso o azulejo para cubrir suelos y paredes, y por lo general de superficie pulida. En el campo lingüístico, Corominas lo supone derivado de piedra baldosa o «ladrillo superpuesto», por oposición a la piedra natural que conformara una superficie habitable.

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A tile is a manufactured piece of hard-wearing material such as ceramic, stone, metal, or even glass, generally used for covering roofs, floors, walls, showers, or other objects such as tabletops. Alternatively, tile can sometimes refer to similar units made from lightweight materials such as perlite, wood, and mineral wool, typically used for wall and ceiling applications. In another sense, a tile is a construction tile or similar object, such as rectangular counters used in playing games (see tile-based game). The word is derived from the French word tuile, which is, in turn, from the Latin word tegula, meaning a roof tile composed of fired clay. Tiles are often used to form wall and floor coverings, and can range from simple square tiles to complex mosaics. Tiles are most often made of ceramic, typically glazed for internal uses and unglazed for roofing, but other materials are also commonly used, such as glass, cork, concrete and other composite materials, and stone. Tiling stone is typically marble, onyx, granite or slate. Thinner tiles can be used on walls than on floors, which require more durable surfaces that will resist impacts.

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