Bookworm

noun

1. One who spends much time reading or studying.
2. Any of various insects, especially booklice and silverfish, that infest books and feed on the paste in the bindings.
3. A name given to the larvæ of various insects, which gnaw and injure books, but particularly to those of two species of small beetles, Anobium (Sitodrepa) paniceum and Ptinus brunneus, belonging to the family Ptinidæ.
4. A person closely addicted to study; one devoted to the reading of or to research in books: as, “these poring book-worms,” Tatler, No. 278.
5. Any larva of a beetle or moth, which is injurious to books. Many species are known.