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

 

dysprosium

 noun
noun
BrE BrE//dɪsˈprəʊziəm//
 
; NAmE NAmE//dɪsˈproʊziəm//
 
[uncountable](symbol Dy)
 
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a chemical element. Dysprosium is a soft silver-white metal used in nuclear research. Word Origin late 19th cent.: from Greek dusprositos ‘hard to get at’ + -ium.
See the Oxford Advanced American Dictionary entry: dysprosium