Meaning of RUBIDIUM
| Pronunciation: | | roo'bideeum
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 WordNet Dictionary |
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| | Definition: | | [n] 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 |
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| | Synonyms: | | atomic number 37, Rb |
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| | See Also: | | carnallite, lepidolite, metal, metallic element, pollucite | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Ru*bid"i*um\, n. [NL., fr. L. rubidus red, fr. rubere
to be red. So called from two dark red spectroscopic lines by
means of which it was discovered in the lepidolite from
Rozena, Moravia. See {Rubicund}.] (Chem.)
A rare metallic element. It occurs quite widely, but in small
quantities, and always combined. It is isolated as a soft
yellowish white metal, analogous to potassium in most of its
properties. Symbol Rb. Atomic weight, 85.2.
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