Europium

n.

1.

(Chem.) A metallic element of the rare-earth group (Lanthanide series), discovered spectroscopically by Demarcay in 1896. Symbol, Eu; atomic number 63; at. wt., 151.965 (C=12.011); valence = +2 or +3.

Noun

1.

europium - a bivalent and trivalent metallic element of the rare earth group Synonyms: atomic number 63, Eu

atomic number 63, Eu, metal, metallic element, monazite