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 Iran’s Atomic Energy Organization’s Ali Akbar Salehi also said that Iran was moving to restart activity at the heavy water nuclear reactor at the Arak facility, according to multiple accounts. — Adam Taylor, Washington Post, "Iran has 24 tons of enriched uranium and is preparing to restart heavy-water nuclear reactor, official claims," 29 July 2019 Kamalvandi spoke to Iranian journalists in a news conference at the country’s Arak heavy water nuclear reactor. — Jon Gambrell, BostonGlobe.com, "Iran says it will break uranium stockpile limit in 10 days," 17 June 2019 Kamalvandi spoke to Iranian journalists at the country's Arak heavy water nuclear reactor. — Nasser Karimi And Jon Gambrell, chicagotribune.com, "Iran speeds up uranium enrichment as Mideast tensions mount," 17 June 2019 Kamalvandi spoke to Iranian journalists in a news conference at the country’s Arak heavy water nuclear reactor. — Jon Gambrell, Fortune, "Iran Says It Will Break Uranium Stockpile Limit in 10 Days," 17 June 2019 The spokesman, Behrouz Kamalvandi, spoke to journalists at Iran’s Arak heavy water facility. — Fox News, "Iran to break uranium stockpile limit set by nuclear deal, spokesman says," 17 June 2019 Rouhani said at the time that Iran would keep its excess enriched uranium and heavy water, instead of selling it to other countries. — Nada Bashir, Hira Humayun And Bianca Britton, CNN, "Iran says it will ramp up low-grade uranium enrichment, exceed stockpile limit in 10 days," 17 June 2019 During a news conference at the Arak heavy water reactor facility, Behrouz Kamalvandi said that Iran had increased low enriched uranium production fourfold and would exceed the limit of 300 kilograms by June 27. — Nada Bashir, Hira Humayun And Bianca Britton, CNN, "Iran says it will ramp up low-grade uranium enrichment, exceed stockpile limit in 10 days," 17 June 2019 Kamalvandi, made the announcement during a press conference with local journalists at Iran's Arak heavy water facility that was carried live on Iranian state television. — NBC News, "Iran says its uranium stockpile will breach nuclear deal," 17 June 2019

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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The first known use of heavy water was in 1933

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