"disulphuric acid" meaning in English

{
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        "3": "sulphuric"
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      "expansion": "di- + sulphuric",
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    {
      "args": {
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  ],
  "etymology_text": "di- + sulphuric + acid",
  "head_templates": [
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      "expansion": "disulphuric acid",
      "name": "en-noun"
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  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Acids",
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          "name": "Inorganic compounds",
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sulfur",
          "orig": "en:Sulfur",
          "parents": [
            "Chalcogens",
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
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            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "A thick oily liquid, H₂S₂O₇."
      ],
      "id": "en-disulphuric_acid-en-noun-0YbxHyJU",
      "links": [
        [
          "inorganic chemistry",
          "inorganic chemistry"
        ]
      ],
      "raw_glosses": [
        "(inorganic chemistry) A thick oily liquid, H₂S₂O₇."
      ],
      "synonyms": [
        {
          "word": "Nordhausen acid"
        },
        {
          "word": "disulfuric acid"
        }
      ],
      "topics": [
        "chemistry",
        "inorganic-chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "disulphuric acid"
}

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  "etymology_templates": [
    {
      "args": {
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        "2": "di",
        "3": "sulphuric"
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      "expansion": "di- + sulphuric",
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    {
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        "2": "acid"
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  ],
  "etymology_text": "di- + sulphuric + acid",
  "head_templates": [
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      "expansion": "disulphuric acid",
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  "lang_code": "en",
  "pos": "noun",
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        "en:Acids",
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      "glosses": [
        "A thick oily liquid, H₂S₂O₇."
      ],
      "links": [
        [
          "inorganic chemistry",
          "inorganic chemistry"
        ]
      ],
      "raw_glosses": [
        "(inorganic chemistry) A thick oily liquid, H₂S₂O₇."
      ],
      "topics": [
        "chemistry",
        "inorganic-chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Nordhausen acid"
    },
    {
      "word": "disulfuric acid"
    }
  ],
  "word": "disulphuric acid"
}