rubidium

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noun ru·bid·i·um \rü-ˈbi-dē-əm\

Definition of rubidium

  1. :  a soft silvery metallic element of the alkali metal group that reacts violently with water and bursts into flame spontaneously in air — see element table

Origin and Etymology of rubidium

New Latin, from Latin rubidus red, from rubēre


First Known Use: 1861


Medical Dictionary

rubidium

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noun ru·bid·i·um \rü-ˈbid-ē-əm\

Medical Definition of rubidium

  1. :  a soft silvery metallic element that decomposes water with violence and bursts into flame spontaneously in air—symbol Rb; see element table


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