heavy water

noun
Updated on: 12 Nov 2017

Definition of heavy water

1 :the compound D2O composed of deuterium and oxygen called also deuterium oxide
2 :water enriched in deuterium

Recent Examples of heavy water from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heavy water.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of heavy water

1933


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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