Terbium

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  terbium
       n : a metallic element of the rare earth group; used in lasers;
           occurs in apatite and monazite and xenotime and ytterbite
           [syn: {Tb}, {atomic number 65}]

From Elements database 20001107 [elements]:

  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.