"double helix" meaning in English

{
  "forms": [
    {
      "form": "double helixes",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "double helices",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "+",
        "2": "double helices"
      },
      "expansion": "double helix (plural double helixes or double helices)",
      "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": "other",
          "name": "English metonyms",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2007 January, “WHAT I'VE LEARNED: James Watson”, in Esquire, volume 147, number 1, archived from the original on 2007-01-25",
          "text": "If I had been married earlier in life, I wouldn't have seen the double helix. I would have been taking care of the kids on Saturday.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "DNA."
      ],
      "id": "en-double_helix-en-noun-i9H~Rcrq",
      "links": [
        [
          "DNA",
          "DNA"
        ]
      ],
      "raw_glosses": [
        "(metonymically) DNA."
      ],
      "tags": [
        "metonymically"
      ]
    }
  ],
  "word": "double helix"
}

{
  "forms": [
    {
      "form": "double helixes",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "double helices",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "+",
        "2": "double helices"
      },
      "expansion": "double helix (plural double helixes or double helices)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English metonyms",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2007 January, “WHAT I'VE LEARNED: James Watson”, in Esquire, volume 147, number 1, archived from the original on 2007-01-25",
          "text": "If I had been married earlier in life, I wouldn't have seen the double helix. I would have been taking care of the kids on Saturday.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "DNA."
      ],
      "links": [
        [
          "DNA",
          "DNA"
        ]
      ],
      "raw_glosses": [
        "(metonymically) DNA."
      ],
      "tags": [
        "metonymically"
      ]
    }
  ],
  "word": "double helix"
}