Word Study
    Terbium
WORDNET DICTIONARY
Noun Terbium has 1 sense
- terbium(n = noun.substance) atomic number 65, tb - a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite; Array is a kind of metal, metallic element
CIDE DICTIONARY
Terbium, n. [NL., fr. Ytterby, in Sweden. See Erbium.]. 
                                            
                                         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]                                                                                                                    
                                                                                    OXFORD DICTIONARY
Terbium, n.  Chem.  a silvery metallic element of the lanthanide series.
                    Usage
                        Symb.: Tb.
                                                                                    Etymology
                        mod.L f.  Ytterby in Sweden
                                    
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