"date mussel" meaning in English

{
  "etymology_text": "From its resemblance to the fruit.",
  "forms": [
    {
      "form": "date mussels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "date mussel (plural date mussels)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Bivalves",
          "orig": "en:Bivalves",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A mussel of the genus Lithophaga, medium-sized marine bivalve molluscs in the family Mytilidae."
      ],
      "id": "en-date_mussel-en-noun-DRmiqQPy",
      "links": [
        [
          "mussel",
          "mussel"
        ],
        [
          "Lithophaga",
          "Lithophaga#Translingual"
        ],
        [
          "Mytilidae",
          "Mytilidae#Translingual"
        ]
      ],
      "related": [
        {
          "english": "trace fossil",
          "translation": "trace fossil",
          "word": "Gastrochaenolites"
        }
      ]
    }
  ],
  "word": "date mussel"
}

{
  "etymology_text": "From its resemblance to the fruit.",
  "forms": [
    {
      "form": "date mussels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "date mussel (plural date mussels)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "english": "trace fossil",
      "translation": "trace fossil",
      "word": "Gastrochaenolites"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Bivalves"
      ],
      "glosses": [
        "A mussel of the genus Lithophaga, medium-sized marine bivalve molluscs in the family Mytilidae."
      ],
      "links": [
        [
          "mussel",
          "mussel"
        ],
        [
          "Lithophaga",
          "Lithophaga#Translingual"
        ],
        [
          "Mytilidae",
          "Mytilidae#Translingual"
        ]
      ]
    }
  ],
  "word": "date mussel"
}