"navel-string" meaning in English

{
  "forms": [
    {
      "form": "navel-strings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "navel-string (plural navel-strings)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1936, Rollo Ahmed, The Black Art, London: Long, page 82:",
          "text": "One love potion was composed of the powdered navel string of a new-born baby boy.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The umbilical cord."
      ],
      "id": "en-navel-string-en-noun-O7eIyxzk",
      "links": [
        [
          "umbilical cord",
          "umbilical cord"
        ]
      ],
      "synonyms": [
        {
          "word": "navel string"
        }
      ]
    }
  ],
  "word": "navel-string"
}

{
  "forms": [
    {
      "form": "navel-strings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "navel-string (plural navel-strings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1936, Rollo Ahmed, The Black Art, London: Long, page 82:",
          "text": "One love potion was composed of the powdered navel string of a new-born baby boy.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The umbilical cord."
      ],
      "links": [
        [
          "umbilical cord",
          "umbilical cord"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "navel string"
    }
  ],
  "word": "navel-string"
}