book lung

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Definitions from WordNet

Noun book lung has 1 sense

book lung - organ in many arachnids containing many thin folds of membrane resembling the leaves of a book
--₁ is a kind of respiratory organ

Definitions from the Web

Term: Book Lung

Noun: A respiratory organ found in some arachnids, such as spiders and scorpions, that is composed of thin sheets of respiratory tissue resembling the pages of a book.

Example Sentence: The spider relies on its book lung to breathe, as it does not possess normal lungs like mammals do.

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