/ ɪˈtɜːbiəm; NAmE ɪˈtɜːrb-/ noun
[ U ] ( symb Yb ) a chemical element. Ytterbium is a silver-white metal used to make steel stronger and in some X-ray machines.
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WORD ORIGIN
late 19th cent.: modern Latin , from Ytterby , the name of a Swedish quarry where it was first found.