heavy water
noun
1
: the compound D2O composed of deuterium and oxygen
called also deuterium oxide
2
: water enriched in deuterium
Example Sentences
Recent Examples on the Web Advice to regional residents on lawn and garden care without heavy water use also comes from environmentalists. 
Robert Knox, BostonGlobe.com, 17 Sep. 2022 Drought and heavy water usage by nearby states has diminished Lake Mead's water level for years, dropping more than 170 feet since the reservoir was full in 1983. Camille Fine, USA TODAY, 24 Aug. 2022 Alkins said units on the third, fourth, and fifth floors sustained heavy water damage and the entire building was affected by the smoke. BostonGlobe.com, 27 July 2022 The roof collapsed under the weight of the flames and heavy water sprayed by fire crews, who controlled the fire by 8:30 p.m. Lilly Price, Baltimore Sun, 5 July 2022 Such reactors use heavy water as a coolant and produce plutonium as a waste product, which can be used in nuclear weapons. Laurence Norman, WSJ, 25 May 2022 The barges, along with trees and branches and a heavy water flow pushed one of them down the river to Harpers Ferry, in West Virginia. Dana Hedgpeth, Washington Post, 8 May 2022 The ants pouring out of the sink, onto my arms in dish heavy water. New York Times, 17 Mar. 2022 The westbound portion of the roadway was closed Jan. 27 due to a water main break that had caused icy conditions from heavy water flow. cleveland, 3 Feb. 2022 See More
Robert Knox, BostonGlobe.com, 17 Sep. 2022 Drought and heavy water usage by nearby states has diminished Lake Mead's water level for years, dropping more than 170 feet since the reservoir was full in 1983. Camille Fine, USA TODAY, 24 Aug. 2022 Alkins said units on the third, fourth, and fifth floors sustained heavy water damage and the entire building was affected by the smoke. BostonGlobe.com, 27 July 2022 The roof collapsed under the weight of the flames and heavy water sprayed by fire crews, who controlled the fire by 8:30 p.m. Lilly Price, Baltimore Sun, 5 July 2022 Such reactors use heavy water as a coolant and produce plutonium as a waste product, which can be used in nuclear weapons. Laurence Norman, WSJ, 25 May 2022 The barges, along with trees and branches and a heavy water flow pushed one of them down the river to Harpers Ferry, in West Virginia. Dana Hedgpeth, Washington Post, 8 May 2022 The ants pouring out of the sink, onto my arms in dish heavy water. New York Times, 17 Mar. 2022 The westbound portion of the roadway was closed Jan. 27 due to a water main break that had caused icy conditions from heavy water flow. cleveland, 3 Feb. 2022 See More Word History
First Known Use
1933, in the meaning defined at sense 1
Medical Definition
heavy water
noun
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