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| so·di·um [ sṓdee əm ] |
noun |
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| Definition: |
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abundantly occurring chemical element: a soft silver white metallic element that reacts readily with other substances and is essential to the body's fluid balance. Source: common salt, calcium chloride. Use: catalyst, tracer, in chemical processes.
Symbol Na
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| [Early 19th century. <soda; from its being isolated from caustic soda] |
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