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noun | adjective
ytterbium [i'tə:biəm] n
chem. iterb
 English thesaurus
ytterbium [i'tɜ:biəm] abbr.
abbr., geol. aldebaranium (jagr6880)
Ytterbium [i'tɜ:biəm] abbr.
abbr., scottish Yb