| NOUN | substance | atomic number 38, strontium, Sr | a soft silver-white or yellowish metallic element of the alkali metal group |
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| Meaning | A soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite. | |
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| Synonyms | strontium, Sr | |
| Narrower | strontium 90 | A radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions |
| Broader | metallic element, metal | Any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
| Substance of | celestite | A mineral consisting of strontium sulphate |
| strontianite | A mineral consisting of strontium carbonate | |
| Spanish | estroncio, número atómico 38, Sr | |
| Catalan | estronci, número atòmic 38, Sr | |
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