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sodium Definition
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sodium
noun(so-di-um)a silver-white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically
sodium
noun(so-di-um)a poisonous crystalline salt NaN3 used especially to make lead azide
sodium
noun(so-di-um)a crystalline or granular salt C7H5O2Na used chiefly as a food preservative
sodium
noun(so-di-um)a white crystalline weakly alkaline salt NaHCO3 used especially in baking powders and fire extinguishers and in medicine as an antacid —called also baking soda, bicarbonate of soda
sodium
noun(so-di-um)a crystalline compound NaBH4 used in various industrial applications and as a reducing agent in organic chemistry
sodium
noun(so-di-um)a sodium salt of carbonic acid used especially in making soaps and chemicals, in water softening, in cleaning and bleaching, and in photography: such as
sodium
noun(so-di-um)a hygroscopic crystalline anhydrous strongly alkaline salt Na2CO3
sodium
noun(so-di-um)the transparent crystalline hydrate Na2CO3·10H2O found in nature as natron
sodium
noun(so-di-um)a colorless crystalline salt NaClO3 used especially as an oxidizing agent and weed killer
sodium
noun(so-di-um)an ionic crystalline chemical compound consisting of equal numbers of sodium and chlorine atoms : salt
sodium
noun(so-di-um)a crystalline salt Na3C6H5O7 used chiefly as a buffering agent, as an emulsifier, and in medicine as an expectorant, chelator, alkalinizing agent, and blood anticoagulant
sodium
noun(so-di-um)a white deliquescent poisonous salt NaCN used especially in electroplating, in fumigating, and in treating steel