francium

/ˈfræntsiəm/
IPA guide

Definitions of francium
  1. noun
    a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
    synonyms: Fr, atomic number 87
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    type of:
    metal, metallic element
    any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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