book louse

noun

Definition of book louse

: any of various tiny usually wingless insects (order Psocoptera and especially genus Liposcelis) that feed on organic matter and especially mold, usually inhabit damp areas, and are often found in stored papers, books, and grains

First Known Use of book louse

1753, in the meaning defined above

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Time Traveler for book louse

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The first known use of book louse was in 1753

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Dictionary Entries Near book louse

booklore

book louse

booklover

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Cite this Entry

“Book louse.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/book%20louse. Accessed 4 Oct. 2022.

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