book lung

noun

: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book

Word History

First Known Use

1881, in the meaning defined above

Time Traveler
The first known use of book lung was in 1881

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 10 Jun. 2023.

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

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