"oyster cracker" meaning in English

{
  "etymology_text": "Perhaps because originally served with oyster stew or clam chowder, or because their form (a vaguely round \"shell\" that splits evenly into two parts) was suggestive of the shell of an oyster.",
  "forms": [
    {
      "form": "oyster crackers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oyster cracker (plural oyster crackers)",
      "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"
        }
      ],
      "glosses": [
        "A small, dry, usually round or hexagonal cracker."
      ],
      "id": "en-oyster_cracker-en-noun-Sd4mA-3E",
      "links": [
        [
          "small",
          "small"
        ],
        [
          "dry",
          "dry"
        ],
        [
          "round",
          "round"
        ],
        [
          "hexagonal",
          "hexagonal"
        ]
      ]
    }
  ],
  "word": "oyster cracker"
}

{
  "etymology_text": "Perhaps because originally served with oyster stew or clam chowder, or because their form (a vaguely round \"shell\" that splits evenly into two parts) was suggestive of the shell of an oyster.",
  "forms": [
    {
      "form": "oyster crackers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oyster cracker (plural oyster crackers)",
      "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"
      ],
      "glosses": [
        "A small, dry, usually round or hexagonal cracker."
      ],
      "links": [
        [
          "small",
          "small"
        ],
        [
          "dry",
          "dry"
        ],
        [
          "round",
          "round"
        ],
        [
          "hexagonal",
          "hexagonal"
        ]
      ]
    }
  ],
  "word": "oyster cracker"
}