"indanylidene" meaning in English

{
  "forms": [
    {
      "form": "indanylidenes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "indanylidene (plural indanylidenes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "source": "w"
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A divalent radical derived from the cyclopentane ring of an indane"
      ],
      "id": "en-indanylidene-en-noun-bgcyDt4X",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "radical",
          "radical"
        ],
        [
          "cyclopentane",
          "cyclopentane"
        ],
        [
          "indane",
          "indane"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, especially in combination) A divalent radical derived from the cyclopentane ring of an indane"
      ],
      "tags": [
        "especially",
        "in-compounds"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "indanylidene"
}

{
  "forms": [
    {
      "form": "indanylidenes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "indanylidene (plural indanylidenes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
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        "en:Organic chemistry"
      ],
      "glosses": [
        "A divalent radical derived from the cyclopentane ring of an indane"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "radical",
          "radical"
        ],
        [
          "cyclopentane",
          "cyclopentane"
        ],
        [
          "indane",
          "indane"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, especially in combination) A divalent radical derived from the cyclopentane ring of an indane"
      ],
      "tags": [
        "especially",
        "in-compounds"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "indanylidene"
}