"undecenoic acid" meaning in English

{
  "forms": [
    {
      "form": "undecenoic acids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "undecenoic acid (countable and uncountable, plural undecenoic acids)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Fatty acids",
          "orig": "en:Fatty acids",
          "parents": [
            "Carboxylic acids",
            "Acids",
            "Organic compounds",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "undecylenic acid"
      ],
      "id": "en-undecenoic_acid-en-noun-5kY~D~-~",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "undecylenic acid",
          "undecylenic acid"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) undecylenic acid"
      ],
      "related": [
        {
          "word": "undecenoate"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "undecenoic acid"
}

{
  "forms": [
    {
      "form": "undecenoic acids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "undecenoic acid (countable and uncountable, plural undecenoic acids)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "undecenoate"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "en:Fatty acids"
      ],
      "glosses": [
        "undecylenic acid"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "undecylenic acid",
          "undecylenic acid"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) undecylenic acid"
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "undecenoic acid"
}