heavy water


Definition of heavy water

1 : the compound D2O composed of deuterium and oxygen

called also deuterium oxide

2 : water enriched in deuterium

Examples of heavy water in a Sentence

Recent Examples on the Web The fire affected the central part of the apartment complex, with heavy water and smoke damage on the second and third floors, according to the American Red Cross. Hannah Kirby, Milwaukee Journal Sentinel, 26 Dec. 2021 Significant changes to, and limits to activities at, an experimental heavy water research reactor called Arak. CBS News, 5 Jan. 2022 As Peter Annin writes at The Washington Post, the megadrought has already forced the imposition of heavy water restrictions in many Southwest states and cities, and even more strict controls will likely be imposed by the end of the year. Ryan Cooper, The Week, 17 June 2021 Perhaps most alarming is the heavy water usage, with wells dug to mix vast quantities of cement, leading to the depletion of aquifers and rare desert springs. John Washington, The New Republic, 15 Nov. 2021 Environmental activists have warned that the San Pedro River is in danger of drying up due to heavy water use. Ian James, AZCentral.com, 6 Sep. 2021 Among the heavy water users in the city are 14 marijuana growing facilities, which also contribute a fair amount to city finances through cultivation taxes and a 10% local excise tax on production. Ralph Vartabedian, Los Angeles Times, 4 Sep. 2021 Venus’s overabundance of heavy water is thought to be the dregs from an ocean’s worth of normal water that once graced the planet untold eons ago. Robin George Andrews, Scientific American, 2 June 2021 Water molecules made of heavier deuterium instead of ordinary hydrogen are known, straightforwardly enough, as heavy water. Jeffrey Kluger, Time, 16 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heavy water.' 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 heavy water

1933, in the meaning defined at sense 1

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Time Traveler for heavy water

Time Traveler

The first known use of heavy water was in 1933

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Statistics for heavy water

Last Updated

24 Jan 2022

Cite this Entry

“Heavy water.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heavy%20water. Accessed 27 Jan. 2022.

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More Definitions for heavy water

heavy water


Medical Definition of heavy water

1 : the compound D2O composed of deuterium and oxygen

called also deuterium oxide

2 : water having a higher-than-usual proportion of deuterium among its hydrogen atoms

More from Merriam-Webster on heavy water

Britannica.com: Encyclopedia article about heavy water


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