europium

Noun
  1. A bivalent and trivalent metallic element of the rare earth group (synset 114661354)
    is a 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.
    substance meronym: monazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
    same as: atomic number 63, eu

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