[element of the rare earth family of metals, atomic symbol Eu, atomic number 63, and atomic weight 152; europium is used in the form of its salts as coatings for cathode ray tubes and in the form of its organic derivatives as shift reagents in NMR spectroscopy. ( CSP )] (UMLS (CSP) C0015180) =Element, Ion, or Isotope =Metals, Rare Earth;