"tusk shell" meaning in English

{
  "forms": [
    {
      "form": "tusk shells",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tusk shell (plural tusk shells)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
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        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Mollusks",
          "orig": "en:Mollusks",
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            "Lifeforms",
            "All topics",
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            "Fundamental",
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      ],
      "glosses": [
        "Any of the marine mollusks of the class Scaphopoda, which resemble elephant tusks."
      ],
      "id": "en-tusk_shell-en-noun-R~1DvWq0",
      "links": [
        [
          "mollusk",
          "mollusk"
        ],
        [
          "Scaphopoda",
          "Scaphopoda#Translingual"
        ],
        [
          "tusk",
          "tusk"
        ]
      ],
      "synonyms": [
        {
          "word": "scaphopod"
        }
      ],
      "wikipedia": [
        "tusk shell"
      ]
    }
  ],
  "word": "tusk shell"
}

{
  "forms": [
    {
      "form": "tusk shells",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "tusk shell (plural tusk shells)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "en:Mollusks"
      ],
      "glosses": [
        "Any of the marine mollusks of the class Scaphopoda, which resemble elephant tusks."
      ],
      "links": [
        [
          "mollusk",
          "mollusk"
        ],
        [
          "Scaphopoda",
          "Scaphopoda#Translingual"
        ],
        [
          "tusk",
          "tusk"
        ]
      ],
      "wikipedia": [
        "tusk shell"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "scaphopod"
    }
  ],
  "word": "tusk shell"
}