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1. (n.) strontium
a bivalent, metallic chemical element whose compounds resemble those of calcium, found in nature only in the combined state, as in strontianite: used in fireworks, flares, and tracer bullets.
Etymology: (1800–10; < NL (see strontianite ))
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| Definition of 'strontium' |
Princeton's WordNet |
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1. (noun) strontium, Sr, atomic number 38
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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| Definition of 'strontium' |
Webster Dictionary |
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1. (noun) strontium
a metallic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3
2. (noun) strontium
a radioactive isotope of strontium produced by certain nuclear reactions, and constituting one of the prominent harmful components of radioactive fallout from nuclear explosions; also called radiostrontium. It has a half-life of 28 years
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| Definition of 'strontium' |
U.S. National Library of Medicine |
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1. strontium
An element of the alkaline earth family of metals. It has the atomic symbol Sr, atomic number 38, and atomic weight 87.62.
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Definitions of strontium 
