A soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite.  Synonyms: atomic number 37, rubidium.
 
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"Rb" Quotes from Famous Books — McGuffey's Fourth Eclectic Reader • William Holmes McGuffey  | 
Words linked to "Rb" :   carnallite, metal, pollucite, metallic element, rubidium, lepidolite  | 
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