Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: Rb
  1. 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
    - rubidium, atomic number 37

Type of: metal, metallic element

Part of: carnallite, lepidolite, pollucite

Encyclopedia: Rb