Heavy Water

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Heavy Water

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Water in which the hydrogen of the water molecule consists entirely of the heavy hydrogen isotope of mass 2 ( deuterium). </dd>
Written D₂O. Density, 1.1076 at 20 degrees C. It is used as a moderator in certain types of nuclear reactors. The term is sometimes applied to water whose deuterium content is greater than natural water. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use