1. cesium

noun. ['ˈsiːziːəm'] a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal.


  • pollucite
  • cesium 137
  • atomic number 55
  • caesium
  • Cs
  • metal

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Words that Rhyme with Cesium

  • magnesium

Example sentences of the word cesium

1. Noun, singular or mass
They are typically used to band DNA in cesium chloride.