heavy water

heavy water
heavy water n
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

* * *

a compound analogous to water but containing deuterium, the mass two isotope of hydrogen, the formula being D2O or 2H2O. It differs from ordinary water in having a higher freezing point (3.8°C) and boiling point (101.4°C), and in the fact that it is incapable of supporting life. It is the stable isotope used as a moderator in nuclear reactors. Called also deuterium oxide.

Medical dictionary. 2011.

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