WordReference Random House Unabridged Dictionary of American English © 2024eu•ro•pi•um (yŏŏ rō′pē əm, yə-),USA pronunciation n. [Chem.]- Chemistrya rare-earth metallic element whose salts are light pink. Symbol: Eu;
at. wt.: 151.96;
at. no.: 63.
Collins Concise English Dictionary © HarperCollins Publishers::
europium /jʊˈrəʊpɪəm/ n - 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
Etymology: 20th Century: named after Europe + -ium