(tb) terbiyum

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(Nükleer Bilimler) terbium
a metallic chemical element (symbol Tb) with an atomic number of 65
{i} chemical element
Atomic weight 150
Symbol Tr or Tb
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
A rare metallic element, of uncertain identification, supposed to exist in certain minerals, as gadolinite and samarskite, with other rare ytterbium earth
(tb) terbiyum