super-heavy water

By surface analysis, super +‎ heavy water, or, by surface analysis, superheavy +‎ water.

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super-heavy water (uncountable)

2. (inorganic chemistry) Water containing tritium instead of normal hydrogen (protium) (thus, ³H₂O).

   Alternative forms: super heavy water, superheavy water

   Synonyms: tritiated water (³H₂O sense), tritium oxide

   Hypernyms: water, H₂O < substance

   Coordinate terms: light water (¹H₂O), heavy water (²H₂O), semi-heavy water (¹H-²H-O)

The chemical symbol for deuterium should be ²H, rather than D;^[1] to prevent problems in alphabetical sorting of formulae. Likewise, tritium should be called ³H, rather than T.