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

 

strontium

 noun
noun
BrE BrE//ˈstrɒntiəm//
 
; NAmE NAmE//ˈstrɑːntiəm//
 
; BrE BrE//ˈstrɒnʃiəm//
 
; NAmE NAmE//ˈstrɑːnʃiəm//
 
[uncountable](symbol Sr)
 
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a chemical element. Strontium is a soft silver-white metal. Word Origin early 19th cent.: from strontia (from earlier strontian, denoting native strontium carbonate from Strontian, a parish in the Highland region of Scotland, where it was discovered) + -ium.
See the Oxford Advanced American Dictionary entry: strontium