"very-long-chain" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "very-long-chain"
      },
      "expansion": "very-long-chain (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Having a chain of more than about eighteen carbon atoms."
      ],
      "id": "en-very-long-chain-en-adj-wKyqUIFP",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "chain",
          "chain"
        ],
        [
          "carbon",
          "carbon"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, of an aliphatic compound) Having a chain of more than about eighteen carbon atoms."
      ],
      "raw_tags": [
        "of an aliphatic compound"
      ],
      "synonyms": [
        {
          "word": "very long-chain"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "very-long-chain"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "very-long-chain"
      },
      "expansion": "very-long-chain (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English uncomparable adjectives",
        "en:Organic chemistry"
      ],
      "glosses": [
        "Having a chain of more than about eighteen carbon atoms."
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "chain",
          "chain"
        ],
        [
          "carbon",
          "carbon"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry, of an aliphatic compound) Having a chain of more than about eighteen carbon atoms."
      ],
      "raw_tags": [
        "of an aliphatic compound"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "very long-chain"
    }
  ],
  "word": "very-long-chain"
}