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caustic |
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caustic, any strongly corrosive chemical substance, especially one that attacks organic matter. A caustic alkali is a metal hydroxide, especially that of an alkali metal; caustic soda is sodium hydroxide, and caustic potash is potassium hydroxide. Silver nitrate is another caustic substance; it is sometimes called lunar caustic. Most inorganic acids, e.g., sulfuric acid, are caustic, especially when concentrated. caustic 1. capable of burning or corroding by chemical action 2. of, relating to, or denoting light that is reflected or refracted by a curved surface 3. a surface that envelopes the light rays reflected or refracted by a curved surface 4. a curve formed by the intersection of a caustic surface with a plane 5. Chem a caustic substance, esp an alkali |
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