tritium
noun
tri·ti·um
ˈtri-tē-əm 
ˈtri-shē-
: a radioactive isotope of hydrogen that has one proton and two neutrons in its nucleus and that has three times the mass of ordinary hydrogen
—symbol T
Examples of tritium in a Sentence
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Notes & Opinions on 4-Digit Rolexes Rolex switched from radium to tritium in 1963.
—
Allen Farmelo, Robb Report, 7 May 2024
People are exposed to tritium in small amounts in tap water and in rain.
—Amudalat Ajasa, Washington Post, 22 Aug. 2023
See all Example Sentences for tritium 
Allen Farmelo, Robb Report, 7 May 2024
People are exposed to tritium in small amounts in tap water and in rain.
—Amudalat Ajasa, Washington Post, 22 Aug. 2023
See all Example Sentences for tritium
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'tritium.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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“Tritium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tritium. Accessed 29 May. 2024.
Copy CitationKids Definition
tritium
noun
tri·ti·um
ˈtrit-ē-əm
ˈtrish-ē-
ˈtrish-ē-
: a rare radioactive form of hydrogen having atoms with three times the mass of ordinary light hydrogen atoms
Medical Definition
tritium
noun
tri·ti·um
ˈtrit-ē-əm
ˈtrish-ē-
ˈtrish-ē-
: a radioactive isotope of hydrogen that has three times the mass of ordinary hydrogen
—symbol T
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