tritium
noun
tri·ti·um
ˈtri-tē-əm 
ˈtri-shē-
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
Recent Examples on the Web
Buyers who go for this option can choose between glowing plastic tubes that need to be recharged by exposure to bright light, or vials of slightly radioactive(!) tritium, which doesn't require charging.
—
Ben Coxworth, New Atlas, 24 Mar. 2025
Unlike nuclear fission – which splits atoms and creates dangerous radioactive waste – fusion uses hydrogen isotopes (like tritium and deuterium) and produces helium as a harmless byproduct.
—New Atlas, 22 Dec. 2024
But ramping up the production of tritium, which is usually produced from lithium, will prove far more difficult.
—Farhat Beg, The Conversation, 8 Jan. 2025
Oh yes, and there are also the usual slots – three, in this case – for optional vials of glow-in-the-dark tritium.
—Ben Coxworth, New Atlas, 16 Jan. 2025
See All Example Sentences for tritium
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Ben Coxworth, New Atlas, 24 Mar. 2025
Unlike nuclear fission – which splits atoms and creates dangerous radioactive waste – fusion uses hydrogen isotopes (like tritium and deuterium) and produces helium as a harmless byproduct.
—New Atlas, 22 Dec. 2024
But ramping up the production of tritium, which is usually produced from lithium, will prove far more difficult.
—Farhat Beg, The Conversation, 8 Jan. 2025
Oh yes, and there are also the usual slots – three, in this case – for optional vials of glow-in-the-dark tritium.
—Ben Coxworth, New Atlas, 16 Jan. 2025
See All Example Sentences for tritium
Cite this Entry
“Tritium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tritium. Accessed 22 Apr. 2025.
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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