Definitions for: Rubidium

[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

Webster (1913) 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.

Synonyms: atomic number 37, Rb

See Also: carnallite, lepidolite, metal, metallic element, pollucite

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