THORIUM
\θˈɔːɹi͡əm], \θˈɔːɹiəm], \θ_ˈɔː_ɹ_iə_m]\
Definitions of THORIUM
- 2010 - Medical Dictionary Database
- 1920 - A practical medical dictionary.
- 1914 - Nuttall's Standard dictionary of the English language
- 1874 - Etymological and pronouncing dictionary of the English language
- 1898 - American pocket medical dictionary
- 1916 - Appleton's medical dictionary
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Thorium. A radioactive element of the actinide series of metals. It has an atomic symbol Th, atomic number 90, and atomic weight 232.04. It is used as fuel in nuclear reactors to produce fissionable uranium isotopes. Because of its radioopacity, various thorium compounds are used to facilitate visualization in roentgenography.
By DataStellar Co., Ltd
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A metallic element, symbol Th, atomic weight 232.42; it is radioactive and antiseptic; its disintegration product is mesothorium. The four known thorium emanations are called respectively thorium A, B, C, and D.
By Stedman, Thomas Lathrop
By Nuttall, P.Austin.
By Stormonth, James, Phelp, P. H.
