Definition of rubidium

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  • rubidium is a valid Scrabble US word with a point value of 13
  • rubidium is a valid Scrabble UK word with a point value of 13
  • rubidium is a valid Words with friends word with a point value of 17

Definition of rubidium

  • 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 (noun)

    Synonyms

    1. atomic number 37
    2. rb

See definition of rubidium in Merriam Webster