Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun atomic_number_87

1 sense of atomic number 87

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