noun europium The chemical element of atomic number 63, a soft silvery-white metal of the lanthanide series. Europium oxide is used with yttrium oxide as a red phosphor in color television screens. 1
noun europium a soft ductile reactive silvery-white element of the lanthanide series of metals: used as the red phosphor in colour television and in lasers. Symbol: Eu; atomic no: 63; atomic wt: 151.965; valency: 2 or 3; relative density: 5.244; melting pt: 822°C; boiling pt: 1527°C 0
noun europium a chemical element, one of the rare-earth elements, used as the red phosphor in color TVs: symbol, Eu; at. no., 63 0
