English dictionary
terbium
/'t/[@]/rb/i//@/m/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
Source: WordNet 3.0
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A rare metallic element, of uncertain identification, supposed to exist in certain minerals, as gadolinite and samarskite, with other rare ytterbium earth. Symbol Tr or Tb. Atomic weight 150.
Source: webster1913