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FR
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I. (noun)
Sense 1
Meaning:
A radioactive element of the alkali-metal group discovered as a disintegration product of actinium
Synonyms:
atomic number 87; Fr; francium
Classified under:
Hypernyms ("Fr" is a kind 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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