"D₂" meaning in All languages combined

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      "glosses": [
        "Deuterium-deuterium, a type of hydrogen (H₂) molecule. In other words, dideuterium, or diatomic deuterium."
      ],
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          "deuterium",
          "deuterium"
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          "hydrogen",
          "hydrogen"
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          "deuterium",
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          "hydrogen",
          "hydrogen"
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