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Origin of heavy water
Words nearby heavy water
Example sentences from the Web for heavy water
Water molecules made of heavier deuterium instead of ordinary hydrogen are known, straightforwardly enough, as heavy water.Mars Has Much More Water Than Previously Known—But There's a Catch|Jeffrey Kluger|March 16, 2021|Time
Fluoride first entered an American water supply through a rather inelegant technocratic scheme.
When cities started adding chlorine to their water supplies, in the early 1900s, it set off public outcry.
Before anti-vaxxers, there were anti-fluoriders: a group who spread fear about the anti-tooth decay agent added to drinking water.
Placed in drinking water, fluoride can serve people who otherwise have poor access to dental care.
In secret, before the referendum, the council went ahead and fluoridated the water anyway.
Urbanity ushers in water that needs no apology, and gives a zest to the worst vintage.Pearls of Thought|Maturin M. Ballou
The two women had no intention of bathing; they had just strolled down to the beach for a walk and to be alone and near the water.The Awakening and Selected Short Stories|Kate Chopin
Mrs. Woodbury paints in oils and water-colors; the latter are genre scenes, and among them are several Dutch subjects.Women in the fine arts, from the Seventh Century B.C. to the Twentieth Century A.D.|Clara Erskine Clement
The policemen looked dull and heavy, as if never again would any one be criminal, and as if they had come to know it.Bella Donna|Robert Hichens
Drone: the largest tube of a bag-pipe, giving forth a dull heavy tone.Gulliver's Travels|Jonathan Swift
British Dictionary definitions for heavy water
Scientific definitions for heavy water
A Closer Look
The nucleus of most hydrogen atoms consists of a single proton, but in one isotope of hydrogen, called deuterium or heavy hydrogen, the nucleus also contains a neutron and thus weighs nearly twice as much as standard hydrogen. The substance called heavy water is chemically identical to ordinary water (H2O), except that the hydrogen atoms in the molecule are the deuterium isotopes (D2O). Heavy water makes up a small percentage (0.02%) of water naturally occurring on Earth. It is an excellent moderator for nuclear reactions, slowing down the fast neutrons produced in a nuclear fission reaction, increasing the likelihood that the neutrons will successfully collide with heavy nuclei to cause further fission. Although heavy water is chemically nearly identical with ordinary water, it is about ten percent heavier and interferes with cell mitosis if consumed in place of normal water. Ice cubes made of heavy water are denser than ordinary liquid water and will sink to the bottom of a glass of cola.
Cultural definitions for heavy water
Water with a higher average molecular weight than ordinary water. In a molecule of heavy water, the hydrogen atoms are isotopes in which the nuclei each contain a proton and a neutron, and hence are twice as heavy as a normal hydrogen atom.