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1. (in organic chemistry) a combining form representing sodium, in compound words: sodio-cupric chloride.
noun 1. Chemistry. a soft, silver-white, metallic element that oxidizes rapidly in moist air, occurring in nature only in the combined state, and used in the synthesis of sodium peroxide, sodium cyanide, and tetraethyllead: a necessary element in the body for the maintenance of normal fluid balance and other physiological functions. Symbol: Na; atomic weight: […]
noun, Chemistry. 1. a white, crystalline, water-insoluble, flammable powder, NaNH 2 , used chiefly in the manufacture of sodium cyanide and in organic synthesis.
noun, Chemistry. 1. a colorless, odorless, crystalline, water-soluble solid, NaNH 4 HPO 4 ⋅4H 2 O, originally obtained from human urine: used as a blowpipe flux in testing metallic oxides.