Cesium (noun) Definition, Meaning & Examples

noun
  1. a rare, highly reactive, soft, metallic element of the alkali metal group, used chiefly in photoelectric cells. Symbol: Cs; atomic weight: 132.905; atomic number:55;specific gravity: 1.9 at 20°C; melts at 28.5°C.
noun
  1. the usual US spelling of caesium
Cs
    Cesium (noun) Definition, Meaning & Examples

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