tritium

noun
tri·​ti·​um | \ˈtri-tē-əm, ˈtri-shē-\

Definition of tritium 

: 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

The filters, however, don’t catch tritium, a radioactive isotope of hydrogen. Vince Beiser, WIRED, "Fukushima’s Other Big Problem: A Million Tons of Radioactive Water," 27 Apr. 2018 The reactor was completed five years ago and, though it's designed for civilian use, it could be used to produce plutonium or tritium, the report stated. Fox News, "North Korea begins testing experimental reactor at nuclear site despite 'denuclearization' talk," 28 Mar. 2018 Meanwhile, the freeze on new material — including tritium, an element necessary for the North to make advanced atomic bombs as well as the far more powerful hydrogen bombs — would mean that the program would slowly decay. William J. Broad, The Seattle Times, "Bolton says North Korea could disarm in a year," 2 July 2018 Meanwhile, the freeze on new material — including tritium, an element necessary for the North to make advanced atom bombs as well as the far more powerful hydrogen bombs — would mean that the program would slowly decay. David E. Sanger, New York Times, "As Bolton Says North Korea Could Disarm in a Year, Reality Lags Promises," 1 July 2018 Levels of tritium in that water are low, but nevertheless there’s great sensitivity to the suggestion that it be discharged. William Steel, Ars Technica, "Remediating Fukushima—“When everything goes to hell, you go back to basics”," 11 May 2018 Okay, so isotopic information is one way to investigate whether the North Korean weapon was nuclear, thermonuclear, or tritium-boosted. Andrew Karam, Popular Mechanics, "Nuclear Forensics: How Scientists Can Tell Whether North Korea Is Lying About Its Bomb Test," 7 Jan. 2016 Klein, among others, believes that the concentrations of tritium are low enough that the water can safely be released into the sea. Vince Beiser, WIRED, "Fukushima’s Other Big Problem: A Million Tons of Radioactive Water," 27 Apr. 2018 But it could also be used to produce plutonium or tritium. Washington Post, "Ahead of Trump summit, new activity at North Korea nuke site," 28 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tritium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tritium

1933, in the meaning defined above

History and Etymology for tritium

New Latin, from Greek tritos third — more at third entry 1

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Time Traveler for tritium

The first known use of tritium was in 1933

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More Definitions for tritium

tritium

noun
tri·​ti·​um | \ˈtrit-ē-əm, ˈtrish-ē- \

Medical Definition of tritium 

: 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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