/ Dictionary / Index B booklouse: Meaning and Definition of Find definitions for: book•louse Pronunciation: (book'lous"), [key] — pl. -lice any of numerous minute, wingless insects of the order Psocoptera, often living among books or papers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: booklouse (Thesaurus) book lore booklover Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language