First Known Use: 1861
Dictionary
rubidium
noun ru·bid·i·um \rü-ˈbi-dē-əm\
Definition of RUBIDIUM
: 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
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Origin of RUBIDIUM
New Latin, from Latin rubidus red, from rubēre
Medical Dictionary
rubidium
noun ru·bid·i·um \rü-ˈbid-ē-əm\
Medical Definition of RUBIDIUM
: 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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