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

yttrium

noun
 
/ˈɪtriəm/
 
/ˈɪtriəm/
[uncountable]
(symbol Y)
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  1. a chemical element. Yttrium is a grey-white metal used in magnets.
    Word Originearly 19th cent.: modern Latin, from Ytterby, the name of a Swedish quarry where it was first found.
See yttrium in the Oxford Advanced American Dictionary
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