"alkoxymethylidene" meaning in English

{
  "forms": [
    {
      "form": "alkoxymethylidenes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "alkoxymethylidene (plural alkoxymethylidenes)",
      "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": [
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          "source": "w"
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        {
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          "langcode": "en",
          "name": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
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            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "Any alkoxy derivative of a methylidene radical"
      ],
      "id": "en-alkoxymethylidene-en-noun-CQPMlhoG",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "alkoxy",
          "alkoxy"
        ],
        [
          "methylidene",
          "methylidene"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, especially in combination) Any alkoxy derivative of a methylidene radical"
      ],
      "tags": [
        "especially",
        "in-compounds"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "alkoxymethylidene"
}

{
  "forms": [
    {
      "form": "alkoxymethylidenes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "alkoxymethylidene (plural alkoxymethylidenes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      ],
      "glosses": [
        "Any alkoxy derivative of a methylidene radical"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "alkoxy",
          "alkoxy"
        ],
        [
          "methylidene",
          "methylidene"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, especially in combination) Any alkoxy derivative of a methylidene radical"
      ],
      "tags": [
        "especially",
        "in-compounds"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "alkoxymethylidene"
}