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

Word History

First Known Use

1753, in the meaning defined above

Time Traveler
The first known use of book louse was in 1753

Dictionary Entries Near book louse

Cite this Entry

“Book louse.” Dictionary, Merriam-Webster, Accessed 10 Dec. 2023.

Kids Definition

book louse

: any of several minute wingless insects that feed on and injure books
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