heavy hydrogen

noun

Examples of heavy hydrogen in a Sentence

Recent Examples on the Web But as the temperature goes up, more heavy hydrogen evaporates, eventually precipitating out over Greenland. Kathy A Svitil, Discover Magazine, 11 Nov. 2019 The subsequent radiation, pressure, and energy then fuses two types of heavy hydrogen, tritium and deuterium, to form helium. Time, 24 July 2023 The real purpose of ITER—to run high-power fusion experiments using a mixture of the heavy hydrogen isotopes deuterium and tritium—won’t happen until more than a decade after the machine hits its first plasma milestone. Charles Seife, Scientific American, 15 June 2023 In 1997, three scientists from the University of California, San Diego, used the ratio of heavy hydrogen nuclei—hydrogen with an extra neutron—to normal hydrogen to estimate that baryons should make up about 5 percent of the mass-energy budget of the universe. Popular Science, 31 May 2020 Most models predicted a heavy hydrogen content, but the observations indicate none is there! Andrew Moseman, Discover Magazine, 2 Dec. 2010 The target itself is a tiny hollow shell filled with the heavy hydrogen isotopes deuterium and tritium. Discover Magazine, 29 June 2010 Water-rich asteroids have more heavy hydrogen as part of their composition, especially compared to the water found on the Earth. Joshua Hawkins, BGR, 7 Dec. 2021 According to Daly, the Sun has very low levels of heavy hydrogen called deuterium. Joshua Hawkins, BGR, 7 Dec. 2021 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'heavy hydrogen.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of heavy hydrogen was in 1933

Dictionary Entries Near heavy hydrogen

Cite this Entry

“Heavy hydrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heavy%20hydrogen. Accessed 29 Feb. 2024.

Kids Definition

heavy hydrogen

noun

Medical Definition

heavy hydrogen

noun

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