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book lung
noun
: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book
Examples of book lung in a Sentence
Recent Examples on the Web
In these final moments, his partially shed exoskeleton blocked his book lungs—delicate, platelike structures that allowed air to enter his body passively.
—Katie Weeman, Scientific American, 29 Sep. 2023
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Word History
First Known Use
1881, in the meaning defined above
Dictionary Entries Near book lung
Cite this Entry
“Book lung.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/book%20lung. Accessed 21 Nov. 2024.
Kids Definition
book lung
noun
: a specialized breathing organ of spiders and related animals
Medical Definition
book lung
noun
: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book
More from Merriam-Webster on book lung
Britannica.com: Encyclopedia article about book lung
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