What does "booklouse" mean?

Any of the small insects that feed on bookbindings, especially those of the order Psocodea.

What is a synonym for "booklouse"?

Common synonyms include: book louse, deathwatch, liposcelis divinatorius, psocid, trogium.

noun

noun ·Rare ·Advanced level

Noun

1
Any of the small insects that feed on bookbindings, especially those of the order Psocodea.
2
minute wingless psocopterous insects injurious to books and papers wordnet

From book + louse. So called because they feed on bookbinding glue.