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rubidium
Definitions
[rʊˈbɪdɪəm], (Noun)
Definitions:
- the chemical element of atomic number 37, a rare soft silvery reactive metal of the alkali metal group
Phrases:
Origin
:
mid 19th century: modern Latin, from Latin rubidus ‘red’ (with reference to its spectral lines)
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definition by Oxford Dictionaries