"propylidene" meaning in English

{
  "forms": [
    {
      "form": "propylidenes",
      "tags": [
        "plural"
      ]
    }
  ],
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    {
      "args": {},
      "expansion": "propylidene (plural propylidenes)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "name": "Organic chemistry",
          "orig": "en:Organic chemistry",
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      ],
      "glosses": [
        "The divalent radical CH₃-CH₂-CH="
      ],
      "id": "en-propylidene-en-noun-M7f0rohq",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "divalent",
          "divalent"
        ],
        [
          "radical",
          "radical"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, especially in combination) The divalent radical CH₃-CH₂-CH="
      ],
      "tags": [
        "especially",
        "in-compounds"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "propylidene"
}

{
  "forms": [
    {
      "form": "propylidenes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "propylidene (plural propylidenes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      ],
      "glosses": [
        "The divalent radical CH₃-CH₂-CH="
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "divalent",
          "divalent"
        ],
        [
          "radical",
          "radical"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, especially in combination) The divalent radical CH₃-CH₂-CH="
      ],
      "tags": [
        "especially",
        "in-compounds"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "propylidene"
}