Sodium

//ˈsəʊ.dɪəm// noun

Definitions

Noun
  1. 1
    The chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.990. It is a soft, waxy, silvery, reactive alkali metal that is never found unbound in nature. uncountable, usually
  2. 2
    a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt) wordnet
  3. 3
    Employing sodium. attributive, uncountable, usually

    "From Keighley onwards we had obviously returned to civilisation, for the surrounding country was now studded with the sodium street lights of suburbia and a thickening industrial haze was blotting out the moon."

Etymology

Coined by British chemist Humphry Davy in 1808, from soda + -ium.

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