"T₂" meaning in Translingual

{
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        "1": "mul",
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      "expansion": "T₂",
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  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        "Tritium-tritium, an isotopic variant of the hydrogen molecule H₂; diatomic tritium."
      ],
      "id": "en-T₂-mul-symbol-1HpaceR9",
      "links": [
        [
          "tritium",
          "tritium"
        ],
        [
          "isotopic",
          "isotopic"
        ],
        [
          "hydrogen",
          "hydrogen"
        ],
        [
          "diatomic",
          "diatomic"
        ]
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "langcode": "mul",
          "name": "Topology",
          "orig": "mul:Topology",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "21 79",
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "21 79",
          "kind": "other",
          "name": "Translingual terms with non-redundant non-automated sortkeys",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "5 95",
          "kind": "other",
          "langcode": "mul",
          "name": "Chemical formulae",
          "orig": "mul:Chemical formulae",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "13 87",
          "kind": "other",
          "langcode": "mul",
          "name": "Inorganic compounds",
          "orig": "mul:Inorganic compounds",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "43 57",
          "kind": "other",
          "langcode": "mul",
          "name": "Isotopes",
          "orig": "mul:Isotopes",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The Hausdorff property; a category of topological spaces with this property."
      ],
      "id": "en-T₂-mul-symbol-6CJ1r1q2",
      "links": [
        [
          "topology",
          "topology"
        ],
        [
          "Hausdorff",
          "Hausdorff"
        ],
        [
          "category",
          "category"
        ],
        [
          "topological space",
          "topological space"
        ]
      ],
      "raw_glosses": [
        "(topology) The Hausdorff property; a category of topological spaces with this property."
      ],
      "topics": [
        "mathematics",
        "sciences",
        "topology"
      ]
    }
  ],
  "wikipedia": [
    "International Union of Pure and Applied Chemistry"
  ],
  "word": "T₂"
}

{
  "categories": [
    "Pages with 2 entries",
    "Pages with entries",
    "Translingual entries with incorrect language header",
    "Translingual lemmas",
    "Translingual symbols",
    "Translingual terms spelled with ₂",
    "Translingual terms with non-redundant non-automated sortkeys",
    "mul:Chemical formulae",
    "mul:Inorganic compounds",
    "mul:Isotopes"
  ],
  "head_templates": [
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        "2": "symbol"
      },
      "expansion": "T₂",
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  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "glosses": [
        "Tritium-tritium, an isotopic variant of the hydrogen molecule H₂; diatomic tritium."
      ],
      "links": [
        [
          "tritium",
          "tritium"
        ],
        [
          "isotopic",
          "isotopic"
        ],
        [
          "hydrogen",
          "hydrogen"
        ],
        [
          "diatomic",
          "diatomic"
        ]
      ]
    },
    {
      "categories": [
        "mul:Topology"
      ],
      "glosses": [
        "The Hausdorff property; a category of topological spaces with this property."
      ],
      "links": [
        [
          "topology",
          "topology"
        ],
        [
          "Hausdorff",
          "Hausdorff"
        ],
        [
          "category",
          "category"
        ],
        [
          "topological space",
          "topological space"
        ]
      ],
      "raw_glosses": [
        "(topology) The Hausdorff property; a category of topological spaces with this property."
      ],
      "topics": [
        "mathematics",
        "sciences",
        "topology"
      ]
    }
  ],
  "wikipedia": [
    "International Union of Pure and Applied Chemistry"
  ],
  "word": "T₂"
}