bookworm (n.)youdaoicibaDictYouDict[bookworm 词源字典]
1590s (of people), 1855 of insects or maggots; there is no single species known by this name, which is applied to the anolium beetle, silverfishes, and book lice. See book (n.) + worm (n.).[bookworm etymology, bookworm origin, 英语词源]