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