"oxylium ion" meaning in English

{
  "forms": [
    {
      "form": "oxylium ions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oxylium ion (plural oxylium ions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "langcode": "en",
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          "orig": "en:Chemistry",
          "parents": [
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            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "methoxylium – CH3O+"
        },
        {
          "word": "hydroxylium – HO+"
        }
      ],
      "glosses": [
        "Any cation of general formula R-O⁺."
      ],
      "id": "en-oxylium_ion-en-noun-d3MoN6IM",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "cation",
          "cation"
        ],
        [
          "general formula",
          "general formula"
        ]
      ],
      "raw_glosses": [
        "(chemistry) Any cation of general formula R-O⁺."
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "oxylium ion"
}

{
  "derived": [
    {
      "word": "methoxylium – CH3O+"
    },
    {
      "word": "hydroxylium – HO+"
    }
  ],
  "forms": [
    {
      "form": "oxylium ions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oxylium ion (plural oxylium ions)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English multiword terms",
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        "en:Chemistry"
      ],
      "glosses": [
        "Any cation of general formula R-O⁺."
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "cation",
          "cation"
        ],
        [
          "general formula",
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        ]
      ],
      "raw_glosses": [
        "(chemistry) Any cation of general formula R-O⁺."
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "oxylium ion"
}