Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun atomic_number_68

1 sense of atomic number 68

Sense 1
erbium, Er, atomic number 68 -- (a trivalent metallic element of the rare earth group; occurs with yttrium)
       => 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.)