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terbium n. 稀土族元素,符號Tb,原子序65 稀土族元素,符號Tb,原子序65 terbium n 1: a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite [synonym: {terbium}, {Tb}, {atomic number 65}] Terbium \Ter"bi*um\, n. [NL., fr. Ytterby, in Sweden. See {Erbium}.] (Chem.) A rare metallic element, found in certain minerals, as gadolinite and samarskite, with other rare earths such as ytterbium. Symbol Tb. Atomic number 65. Atomic weight 158.925. [1913 Webster PJC] terbium
Symbol: Tb Atomic number: 65 Atomic weight: 158.924 Silvery metallic element belonging to the lanthanoids. Tb-159 is the only stable isotope, there are seventeen artificial isotopes. Discovered by G.G. Mosander in 1843.
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