a soft, silver-gray, ductile chemical element, one of the rare-earth elements, found in gadolinite and other minerals: symbol, Tb; at. no. 65
Origin of terbiumModL: so named (1843) by K. G. Mosander, its discoverer, after Ytterby: see erbium
A soft, silvery-gray metallic rare-earth element, extracted chiefly from monazite, used in high-temperature fuel cells as a stabilizer and in alloys responsive to a magnetic field. Terbium oxide provides an important phosphor in cathode-ray tubes and low-energy lighting applications. Atomic number 65; atomic weight 158.925; melting point 1,356°C; boiling point 3,230°C; specific gravity 8.230; valence 3, 4. See Periodic Table.
Origin of terbiumAfter Ytterby, a town in Sweden.
- a metallic chemical element (symbol Tb) with an atomic number of 65
After Ytterby, Sweden.