"pentadienoic acid" meaning in English

{
  "forms": [
    {
      "form": "pentadienoic acids",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "pentadienoic acid (plural pentadienoic acids)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "The unsaturated aliphatic carboxylic acid CH₂=CH-CH=CH-COOH"
      ],
      "id": "en-pentadienoic_acid-en-noun-rIfqsFV3",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "unsaturated",
          "unsaturated"
        ],
        [
          "aliphatic",
          "aliphatic"
        ],
        [
          "carboxylic acid",
          "carboxylic acid"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) The unsaturated aliphatic carboxylic acid CH₂=CH-CH=CH-COOH"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "pentadienoic acid"
}

{
  "forms": [
    {
      "form": "pentadienoic acids",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pentadienoic acid (plural pentadienoic acids)",
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  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "The unsaturated aliphatic carboxylic acid CH₂=CH-CH=CH-COOH"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "unsaturated",
          "unsaturated"
        ],
        [
          "aliphatic",
          "aliphatic"
        ],
        [
          "carboxylic acid",
          "carboxylic acid"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) The unsaturated aliphatic carboxylic acid CH₂=CH-CH=CH-COOH"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "pentadienoic acid"
}