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| trit·i·um [ tríttee əm ] |
noun |
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| Definition: |
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radioactive isotope of hydrogen: a radioactive isotope of hydrogen occurring naturally in trace amounts and having atomic mass 3 and a half-life of 12.3 years. Although rare in nature, it can be produced artificially and is used in tracers and hydrogen bombs. Symbol T
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| [Mid-20th century. < modern Latin< Greek tritos "third"] |
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