Definition of ytterbium noun from the Oxford Advanced Learner's Dictionary

 

ytterbium

 noun
noun
BrE BrE//ɪˈtɜːbiəm//
 
; NAmE NAmE//ɪˈtɜːrbiəm//
 
[uncountable](symbol Yb)
 
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a chemical element. Ytterbium is a silver-white metal used to make steel stronger and in some X-ray machines. Word Origin late 19th cent.: modern Latin, from Ytterby, the name of a Swedish quarry where it was first found.
See the Oxford Advanced American Dictionary entry: ytterbium