sodium
sodium definition
so·dium (sō′dē əm)
noun
- a soft, silver-white, metallic chemical element, one of the alkali metals, having a waxlike consistency: it is found in nature only in combined form and is extremely active chemically: symbol, Na; at. no., 11
- sodium chloride
Etymology: ModL: so named (1807) by Sir Humphry Davy < soda (because isolated from caustic soda) + -ium
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