strontium Syllabification: (stron·ti·um)Pronunciation: /ˈstränCHēəm, -tēəm/Definition of strontium noun the chemical element of atomic number 38, a soft, silver-white metal of the alkaline earth series. Its salts are used in fireworks and flares because they give a brilliant red light. (Symbol: Sr)Origin: early 19th century: from strontia + -iumstrontium in other Oxford dictionaries Definition of strontium in the British & World English dictionary
