"bootlace worm" meaning in English

{
  "forms": [
    {
      "form": "bootlace worms",
      "tags": [
        "plural"
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      "expansion": "bootlace worm (plural bootlace worms)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Worms",
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      "glosses": [
        "Lineus longissimus, a proboscis worm with highly toxic mucus; it is one of the longest animals known."
      ],
      "id": "en-bootlace_worm-en-noun-rQtlvDDj",
      "links": [
        [
          "proboscis worm",
          "proboscis worm"
        ],
        [
          "toxic",
          "toxic"
        ],
        [
          "mucus",
          "mucus"
        ]
      ],
      "wikipedia": [
        "bootlace worm"
      ]
    }
  ],
  "word": "bootlace worm"
}

{
  "forms": [
    {
      "form": "bootlace worms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "bootlace worm (plural bootlace worms)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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    {
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        "English countable nouns",
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        "en:Worms"
      ],
      "glosses": [
        "Lineus longissimus, a proboscis worm with highly toxic mucus; it is one of the longest animals known."
      ],
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        [
          "proboscis worm",
          "proboscis worm"
        ],
        [
          "toxic",
          "toxic"
        ],
        [
          "mucus",
          "mucus"
        ]
      ],
      "wikipedia": [
        "bootlace worm"
      ]
    }
  ],
  "word": "bootlace worm"
}