"propiolactone" meaning in English

{
  "forms": [
    {
      "form": "propiolactones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
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      "expansion": "propiolactone (countable and uncountable, plural propiolactones)",
      "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",
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          "source": "w"
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          "kind": "topical",
          "langcode": "en",
          "name": "Chemistry",
          "orig": "en:Chemistry",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "Either of two isomeric chemical compounds of the lactone family, α-propiolactone and β-propiolactone."
      ],
      "id": "en-propiolactone-en-noun-zl~M7~n7",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "isomeric",
          "isomeric"
        ],
        [
          "chemical compounds",
          "chemical compounds"
        ],
        [
          "lactone",
          "lactone"
        ]
      ],
      "raw_glosses": [
        "(chemistry) Either of two isomeric chemical compounds of the lactone family, α-propiolactone and β-propiolactone."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ],
      "wikipedia": [
        "propiolactone"
      ]
    }
  ],
  "word": "propiolactone"
}

{
  "forms": [
    {
      "form": "propiolactones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "propiolactone (countable and uncountable, plural propiolactones)",
      "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",
        "English nouns",
        "English uncountable nouns",
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      ],
      "glosses": [
        "Either of two isomeric chemical compounds of the lactone family, α-propiolactone and β-propiolactone."
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "isomeric",
          "isomeric"
        ],
        [
          "chemical compounds",
          "chemical compounds"
        ],
        [
          "lactone",
          "lactone"
        ]
      ],
      "raw_glosses": [
        "(chemistry) Either of two isomeric chemical compounds of the lactone family, α-propiolactone and β-propiolactone."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ],
      "wikipedia": [
        "propiolactone"
      ]
    }
  ],
  "word": "propiolactone"
}