cesium

5 ENTRIES FOUND:

ce·si·um

noun \ˈsē-zē-əm also -zhē-\

Definition of CESIUM

: a silver-white soft ductile element of the alkali metal group that is the most electropositive element known and that is used especially in photoelectric cells — see element table

Origin of CESIUM

New Latin, from Latin caesius bluish gray
First Known Use: 1861

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