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   ru·bid·i·um

   /ro͞oˈbidēəm/

   noun

   • 1. the chemical element of atomic number 37, a rare soft silvery reactive metal of the alkali metal group.

   Word Origin mid 19th century: modern Latin, from Latin rubidus ‘red’ (with reference to its spectral lines).

   Scrabble Points: 13

   • R

     1

   • U

     1

   • B

     3

   • I

     1

   • D

     2

   • I

     1

   • U

     1

   • M

     3

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