"shell sac" meaning in English

{
  "forms": [
    {
      "form": "shell sacs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "shell sac (plural shell sacs)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Animal body parts",
          "orig": "en:Animal body parts",
          "parents": [
            "Body parts",
            "Animals",
            "Body",
            "Anatomy",
            "Lifeforms",
            "All topics",
            "Biology",
            "Medicine",
            "Life",
            "Fundamental",
            "Sciences",
            "Healthcare",
            "Nature",
            "Health"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Zoology",
          "orig": "en:Zoology",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 115:",
          "text": "Baby cephalopods, even octopuses, all have a shell sac, which is comparable to the mantle folds that baby clams and snails use to make their shells.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The sac in which the shell of a mollusc is secreted during development; (now especially) the fold of mantle in which a cephalopod secretes its pen or gladius."
      ],
      "id": "en-shell_sac-en-noun-4qRVMbeD",
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "sac",
          "sac"
        ],
        [
          "shell",
          "shell"
        ],
        [
          "mollusc",
          "mollusc"
        ],
        [
          "secrete",
          "secrete"
        ],
        [
          "mantle",
          "mantle"
        ],
        [
          "cephalopod",
          "cephalopod"
        ],
        [
          "pen",
          "pen"
        ],
        [
          "gladius",
          "gladius"
        ]
      ],
      "raw_glosses": [
        "(zoology) The sac in which the shell of a mollusc is secreted during development; (now especially) the fold of mantle in which a cephalopod secretes its pen or gladius."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "shell sac"
}

{
  "forms": [
    {
      "form": "shell sacs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "shell sac (plural shell sacs)",
      "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",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Animal body parts",
        "en:Zoology"
      ],
      "examples": [
        {
          "ref": "2017, Danna Staaf, Squid Empire, ForeEdge, →ISBN, page 115:",
          "text": "Baby cephalopods, even octopuses, all have a shell sac, which is comparable to the mantle folds that baby clams and snails use to make their shells.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The sac in which the shell of a mollusc is secreted during development; (now especially) the fold of mantle in which a cephalopod secretes its pen or gladius."
      ],
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "sac",
          "sac"
        ],
        [
          "shell",
          "shell"
        ],
        [
          "mollusc",
          "mollusc"
        ],
        [
          "secrete",
          "secrete"
        ],
        [
          "mantle",
          "mantle"
        ],
        [
          "cephalopod",
          "cephalopod"
        ],
        [
          "pen",
          "pen"
        ],
        [
          "gladius",
          "gladius"
        ]
      ],
      "raw_glosses": [
        "(zoology) The sac in which the shell of a mollusc is secreted during development; (now especially) the fold of mantle in which a cephalopod secretes its pen or gladius."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "shell sac"
}