heavy water


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heav·y wa·ter

D2O; water in which the hydrogen atoms are deuterium, or heavy hydrogen (2H), with physical properties that differ noticeably from those of ordinary water; an elevated presence will cause a decrease in metabolic activity; used as a moderator in nuclear reactors because of its capacity to absorb neutrons.
Synonym(s): deuterium oxide

heavy water

water in which the hydrogen component is deuterium (2H), or heavy hydrogen. It has properties different from those of ordinary water. Because of its ability to absorb neutrons, heavy water is used as a moderator in nuclear reactions. Also written as D2O.

heavy water

D2O; an isotopic variety of water, esp. deuterium oxide, in which hydrogen has been displaced by its isotope, deuterium. Its properties differ from ordinary water in that heavy water has a higher freezing and boiling point and does not support life.
See also: water
References in periodicals archive ?
Zonnour put Iran's current heavy water stock at 130 tons, the limit which should not be exceeded under the nuclear agreement.
Far from curbing its nuclear program, this encourages Iran to produce more heavy water to sell -- with a stamp of U.
On the night of February 28, 1943, the party started out for the heavy water works.
Canada has shut down its heavy water refining plants and has been left with large stockpiles of heavy water it can't export as more countries move toward building light-water reactors.
It is also, to varying degrees, about the significance of heavy water, Germany's wartime nuclear research, the sinking of the ferry, the vagaries of military intelligence in wartime, and the ethics of fighting a guerilla war in your own homeland.
Earlier this year, after Newsnight had revealed details of the heavy water transaction for the first time, Dr Howells stated that 'the UK was not in fact a party to the sale of heavy water to Israel'.
He said Britain had merely negotiated the sale back to Norway of surplus heavy water.
Their aim was to destroy a heavy water production facility vital to the Nazi atom bomb project.
5 -- 6 -- ran in SAC edition only) Above, traffic crawls along the southbound side of the Golden State Freeway due to lane closures because of damage to the roadway; at left, Bouquet Canyon Road near Vasquez Canyon Road remains unusable due to heavy water damage.
Many students carry unnecessary items such as heavy water bottles and CD players.
Incentives such as volume-based water rates and rebates on low-flow toilets have helped to reduce the heavy water consumption considerably, but with the population growth forecasted for California's future, state officials continue to look for alternate water resources.
Federation of American Scientists (FAS) defence analyst John Pike said the photographs were "conclusive evidence that Pakistan has an indigenous heavy water production capability on the scale to support the operation of this reactor".