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| Ca |
symbol of the chemical element calcium. |
| calcium |
a soft, silver-white substance that is one of the chemical elements. Calcium is found in many kinds of rocks. It is used by the body for building healthy bones and teeth. (symbol: Ca) |
| lime1 |
a white powder made of calcium oxide. Lime is used in cement, in making steel and paper, and in making some soils better for growing plants. |
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