strontium
noun /ˈstrɒntiəm/,  /ˈstrɒnʃiəm/
  /ˈstrɑːntiəm/,  /ˈstrɑːnʃiəm/
[uncountable] (symbol Sr)
- a chemical element. Strontium is a soft, silver-white metal.Word Originearly 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.