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

 

yttrium

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