"arenonium ion" meaning in English

{
  "forms": [
    {
      "form": "arenonium ions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "arenonium ion (plural arenonium ions)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Ions",
          "orig": "en:Ions",
          "parents": [
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            "Electricity",
            "Matter",
            "Sciences",
            "Electromagnetism",
            "Nature",
            "All topics",
            "Physics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "An arenium ion."
      ],
      "id": "en-arenonium_ion-en-noun-I5~YfQdx",
      "links": [
        [
          "arenium ion",
          "arenium ion"
        ]
      ],
      "raw_glosses": [
        "(obsolete) An arenium ion."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "arenonium ion"
}

{
  "forms": [
    {
      "form": "arenonium ions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "arenonium ion (plural arenonium ions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with obsolete senses",
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        "en:Ions"
      ],
      "glosses": [
        "An arenium ion."
      ],
      "links": [
        [
          "arenium ion",
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        ]
      ],
      "raw_glosses": [
        "(obsolete) An arenium ion."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "arenonium ion"
}