Definition of "limescale" [limescale]

• A white, chalky deposit of calcium carbonate found in kettles, washing machines etc., especially in a hard water area. (noun)

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• "The company will shift capital to developing economies, intensify its focus on higher-margin health and hygiene products and step up investment in its top brands like Nurofen pain-relief medicine, Calgon limescale tabs and Vanish stain remover."
• "Mr. Becht said there are further growth gains to be made for its 'powerbrands', including Calgon limescale tabs and Vanish stain remover."
• "The manufacturers of Calgon, which has a retail recommended price of £8.27 for 15 tablets, says it contains polycarboxylates to soften hard water, preventing limescale from forming, thereby stopping the impairment of the washing machine's performance and reducing the risk of it breaking down."