"book lung" meaning in English

{
  "forms": [
    {
      "form": "book lungs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "book lung (plural book lungs)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "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": "Animal body parts",
          "orig": "en:Animal body parts",
          "parents": [
            "Body parts",
            "Animals",
            "Body",
            "Anatomy",
            "Lifeforms",
            "Human",
            "Biology",
            "Medicine",
            "All topics",
            "Life",
            "Sciences",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Arachnology",
          "orig": "en:Arachnology",
          "parents": [
            "Arthropodology",
            "Zoology",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1996, Michael J. Roberts, Spiders of Britain and Northern Europe, page 16",
          "text": "In addition to book lungs most spiders also have a second respiratory system in the form of paired tracheae; Atypus has none.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A lamellate respiratory organ found in arachnids."
      ],
      "id": "en-book_lung-en-noun-N0kLdYbg",
      "links": [
        [
          "arachnology",
          "arachnology"
        ],
        [
          "lamellate",
          "lamellate"
        ],
        [
          "respiratory",
          "respiratory"
        ],
        [
          "arachnids",
          "arachnids"
        ]
      ],
      "raw_glosses": [
        "(arachnology) A lamellate respiratory organ found in arachnids."
      ],
      "synonyms": [
        {
          "word": "book-lung"
        }
      ],
      "topics": [
        "arachnology",
        "biology",
        "natural-sciences",
        "zoology"
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "feminine",
            "masculine"
          ],
          "word": "boeklong"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "A lamellate respiratory organ found in arachnids",
          "word": "kirjakeuhko"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "feminine"
          ],
          "word": "phyllotrachée"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "feminine"
          ],
          "word": "Buchlunge"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "A lamellate respiratory organ found in arachnids",
          "word": "lemezes tüdő"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "masculine"
          ],
          "word": "polmone a libro"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "feminine"
          ],
          "word": "filotraquéia"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "masculine"
          ],
          "word": "pulmón en libro"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "A lamellate respiratory organ found in arachnids",
          "tags": [
            "feminine"
          ],
          "word": "filotráquea"
        }
      ],
      "wikipedia": [
        "book lung"
      ]
    }
  ],
  "word": "book lung"
}

{
  "forms": [
    {
      "form": "book lungs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "book lung (plural book lungs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Animal body parts",
        "en:Arachnology"
      ],
      "examples": [
        {
          "ref": "1996, Michael J. Roberts, Spiders of Britain and Northern Europe, page 16",
          "text": "In addition to book lungs most spiders also have a second respiratory system in the form of paired tracheae; Atypus has none.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A lamellate respiratory organ found in arachnids."
      ],
      "links": [
        [
          "arachnology",
          "arachnology"
        ],
        [
          "lamellate",
          "lamellate"
        ],
        [
          "respiratory",
          "respiratory"
        ],
        [
          "arachnids",
          "arachnids"
        ]
      ],
      "raw_glosses": [
        "(arachnology) A lamellate respiratory organ found in arachnids."
      ],
      "topics": [
        "arachnology",
        "biology",
        "natural-sciences",
        "zoology"
      ],
      "wikipedia": [
        "book lung"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "book-lung"
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "feminine",
        "masculine"
      ],
      "word": "boeklong"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "A lamellate respiratory organ found in arachnids",
      "word": "kirjakeuhko"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "feminine"
      ],
      "word": "phyllotrachée"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "feminine"
      ],
      "word": "Buchlunge"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "A lamellate respiratory organ found in arachnids",
      "word": "lemezes tüdő"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "masculine"
      ],
      "word": "polmone a libro"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "feminine"
      ],
      "word": "filotraquéia"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "masculine"
      ],
      "word": "pulmón en libro"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "A lamellate respiratory organ found in arachnids",
      "tags": [
        "feminine"
      ],
      "word": "filotráquea"
    }
  ],
  "word": "book lung"
}