noun (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

  lembut perak dari unsur logam alkali kumpulan metal; terbakar di udara dan bereaksi dengan keganasan dalam air; terjadi di carnallite dan lepidolite dan pollucite

  Synonym:
  atomic number 37, rb
  

  source: wordnet30
• 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.

  unsur logam yang langka. ia berlaku cukup luas, tapi carah, dan selalu gabungan. tempat itu terisolasi sebagai lembut logam putih kekuningan, sesuai untuk potassium dalam banyak apa ini. simbol rb. berat atom, 85. 2.

  source: webster1913