"arrow worm" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "arrow",
        "3": "worm"
      },
      "expansion": "arrow + worm",
      "name": "compound"
    }
  ],
  "etymology_text": "arrow + worm",
  "forms": [
    {
      "form": "arrow worms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "arrow worm (plural arrow worms)",
      "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"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Worms",
          "orig": "en:Worms",
          "parents": [
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2017, Danna Staaf, Squid Empire, ForeEdge, page 32",
          "text": "Arrow worms and their ilk may even have driven much of the early Cambrian diversification, as animals tried every trick to avoid getting eaten.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A predatory marine worm of the phylum Chaetognatha."
      ],
      "id": "en-arrow_worm-en-noun-pAERYku5",
      "links": [
        [
          "Chaetognatha",
          "Chaetognatha#Translingual"
        ]
      ],
      "synonyms": [
        {
          "word": "chaetognath"
        }
      ],
      "translations": [
        {
          "code": "eo",
          "lang": "Esperanto",
          "sense": "member of Chaetognatha",
          "word": "ĥetognato"
        },
        {
          "code": "eo",
          "lang": "Esperanto",
          "sense": "member of Chaetognatha",
          "word": "ketognato"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "member of Chaetognatha",
          "word": "nuolimato"
        },
        {
          "code": "nv",
          "lang": "Navajo",
          "sense": "member of Chaetognatha",
          "word": "chʼoshkʼaaʼ"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "member of Chaetognatha",
          "tags": [
            "masculine"
          ],
          "word": "quetognata"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "member of Chaetognatha",
          "tags": [
            "masculine"
          ],
          "word": "quetognato"
        }
      ],
      "wikipedia": [
        "Chaetognatha"
      ]
    }
  ],
  "word": "arrow worm"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "arrow",
        "3": "worm"
      },
      "expansion": "arrow + worm",
      "name": "compound"
    }
  ],
  "etymology_text": "arrow + worm",
  "forms": [
    {
      "form": "arrow worms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "arrow worm (plural arrow worms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
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        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "en:Worms"
      ],
      "examples": [
        {
          "ref": "2017, Danna Staaf, Squid Empire, ForeEdge, page 32",
          "text": "Arrow worms and their ilk may even have driven much of the early Cambrian diversification, as animals tried every trick to avoid getting eaten.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A predatory marine worm of the phylum Chaetognatha."
      ],
      "links": [
        [
          "Chaetognatha",
          "Chaetognatha#Translingual"
        ]
      ],
      "wikipedia": [
        "Chaetognatha"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "chaetognath"
    }
  ],
  "translations": [
    {
      "code": "eo",
      "lang": "Esperanto",
      "sense": "member of Chaetognatha",
      "word": "ĥetognato"
    },
    {
      "code": "eo",
      "lang": "Esperanto",
      "sense": "member of Chaetognatha",
      "word": "ketognato"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "member of Chaetognatha",
      "word": "nuolimato"
    },
    {
      "code": "nv",
      "lang": "Navajo",
      "sense": "member of Chaetognatha",
      "word": "chʼoshkʼaaʼ"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "member of Chaetognatha",
      "tags": [
        "masculine"
      ],
      "word": "quetognata"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "member of Chaetognatha",
      "tags": [
        "masculine"
      ],
      "word": "quetognato"
    }
  ],
  "word": "arrow worm"
}