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From Longman Dictionary of Contemporary English
Related topics: Elements
strontiumstron‧ti‧um /ˈstrɒntiəm $ ˈstrɑːn-/ noun [uncountable]  HCEa soft silver-white metal that is used to make fireworks. It is a chemical element: symbol Sr
Examples from the Corpus
strontiumOther less toxic or benign metals such as calcium, magnesium, and strontium are also efficiently dissolved.Potassium turns into argon, uranium into lead, rubidium into strontium.Electricity produced by radioactive isotopes, strontium 90, polonium 210, by thermoelectric energy conversion.For example, the origin of ivory can be identified by its strontium isotopic composition, which reflects the diet of the elephant.Ferrite, the low-cost non-cobalt material made of ferric oxide and barium or strontium carbonate, was launched in the 1950s.
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