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 Chemical Elements Table
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Recent Examples of rubidium from the Web
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Cornell and Wieman were trying to cool a puff of rubidium gas to within a few billionths of a degree of absolute zero—colder than any place in nature, even the 2.73 kelvins of space.
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In the case of the Judeo-Christian Bible, there's nothing about rubidium and strontium, the five layers of the atmosphere, anything like that.
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The Cold Atom Clock Experiment in Space (CACES) involves trapping, cooling, and probing rubidium atoms within a box that could fit in the trunk of a car.
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The new model suggests our home planet contains significantly more sodium, potassium, chlorine, zinc, strontium, fluorine, gallium, rubidium, niobium, gadolinium, tantalum, helium, argon, and krypton than previously believed.
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Image: Individual rubidium atoms form into a single super-atom in a Bose-Einstein condensate.
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Origin and Etymology of rubidium
New Latin, from Latin rubidus red, from rubēre
Medical Dictionary
medical Definition of rubidium
: a soft silvery metallic element that decomposes water with violence and bursts into flame spontaneously in air
—symbol Rb
— see Chemical Elements Table
Learn More about rubidium
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See words that rhyme with rubidium Britannica.com: Encyclopedia article about rubidium
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