"arsenious acid" meaning in English

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  "lang_code": "en",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Arsenic",
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      "glosses": [
        "Synonym of arsenic trioxide"
      ],
      "id": "en-arsenious_acid-en-noun-VZAqQpPY",
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          "inorganic chemistry",
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          "arsenic trioxide",
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        "(inorganic chemistry) Synonym of arsenic trioxide"
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          "word": "arsenic trioxide"
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      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "acide arsénieux"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "Translations",
          "tags": [
            "masculine"
          ],
          "word": "acido arsenioso"
        },
        {
          "code": "ro",
          "lang": "Romanian",
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          "tags": [
            "masculine"
          ],
          "word": "acid arsenios"
        }
      ]
    }
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  "word": "arsenious acid"
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      "glosses": [
        "Synonym of arsenic trioxide"
      ],
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          "arsenic trioxide",
          "arsenic trioxide#English"
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        "(inorganic chemistry) Synonym of arsenic trioxide"
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          "word": "arsenic trioxide"
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  "translations": [
    {
      "code": "fr",
      "lang": "French",
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      "tags": [
        "masculine"
      ],
      "word": "acide arsénieux"
    },
    {
      "code": "it",
      "lang": "Italian",
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      "tags": [
        "masculine"
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      "word": "acido arsenioso"
    },
    {
      "code": "ro",
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      "tags": [
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      "word": "acid arsenios"
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  "word": "arsenious acid"
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