strontium

n. (Sr) soft silvery metallic element (Chemistry)

Strontium (IPA: ) is a chemical element in the periodic table that has the symbol Sr and the atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when exposed to air. It occurs naturally in the minerals celestine and strontianite. The ⁹⁰Sr isotope is present in radioactive fallout and has a half-life of 28.90 years.
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Strontium /stron·ti·um/ a chemical element, at. no. 38, symbol Sr. strontium 89 a radioactive isotope of strontium having a half-life of 50. [more]Strontium - Community and Resources

Noun
1. a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
(synonym) Sr, atomic number 38
(hypernym) metallic element, metal
(hyponym) strontium 90
(substance-holonym) celestite

n. strontium, metallic element