Dictionary
heavy water
noun
Definition of HEAVY WATER
1
: the compound D2O composed of deuterium and oxygen —called also deuterium oxide
2
: water enriched in deuterium
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First Known Use of HEAVY WATER
1933
Rhymes with HEAVY WATER
Medical Dictionary
heavy water
noun
Medical Definition of HEAVY WATER
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
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