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Meaning of RADIOTHORIUM

Pronunciation:  `reydeeow'thowreeum

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WordNet Dictionary
 
 Definition: [n]  radioactive isotope of thorium with mass number 228
 
 Synonyms: thorium-228
 
 See Also: atomic number 90, Th, thorium

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Ra`di*o*tho"ri*um\, n. (Chem.)
A radioactive substance apparently formed as a product from
thorium.
 

 

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