Rubidium

[ru:'bidiәm]

Definition

(noun.) 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.

Editor: Vicky--From WordNet

Definition

(n.) 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.

Checked by Joy

Definition

n. a soft silvery-white metallic element.

Typed by Dido