heavy water

== English == === Alternative forms === heavywater, heavy-water === Noun === heavy water (uncountable) (inorganic chemistry) Water containing deuterium instead of normal hydrogen (protium) (thus, ²H₂O); used as a moderator in nuclear reactors. Synonyms: deuterium oxide, deuterated water (²H₂O sense) Hypernyms: water, H₂O < substance Coordinate terms: light water (¹H₂O); semi-heavy water (¹H-²H-O), deuterated water (¹H-²H-O sense); super-heavy water (³H₂O), tritiated water (³H₂O) ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === References ===