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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
Recent Examples on the Web
And of course, because this is a titanium Kickstarter multitool, there are also the obligatory slots for optional vials of glow-in-the-dark (and slightly radioactive) tritium.
—Ben Coxworth, New Atlas, 30 Oct. 2024
While deuterium is very common and obtained from water, tritium is very rare.
—Sophie Blondel, The Conversation, 18 Oct. 2024
The one most scientists prefer is deuterium plus tritium.
—Sophie Blondel, The Conversation, 18 Oct. 2024
Siegfried Hecker, a former director of Los Alamos National Laboratory, believes the blasts included two uranium devices that would be suitable for tactical weapons, and one thermonuclear bomb that likely used tritium to boost its yield with a jolt of nuclear fusion.
—Byrichard Stone, science.org, 23 Sep. 2024
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Word History
Etymology
New Latin, from Greek tritos third — more at third entry 1
First Known Use
1933, in the meaning defined above
Dictionary Entries Near tritium
Cite this Entry
“Tritium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tritium. Accessed 22 Nov. 2024.
Kids Definition
tritium
noun
tri·ti·um
ˈtrit-ē-əm
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-
: a radioactive isotope of hydrogen that has three times the mass of ordinary hydrogen
—symbol T
More from Merriam-Webster on tritium
Britannica.com: Encyclopedia article about tritium
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