Highlight the Youdao and Eudic Dictionary New Words Book is a free Chrome add-on developed by XQDD. This add-on allows users to highlight the new words book exported from Youdao Dictionary and Eudic Dictionary. When hovering over the highlighted words, their meanings, phonetics, and pronunciations are displayed, helping users to reinforce their vocabulary while reading English documents.

This add-on is a useful tool for language learners who want to enhance their word memorization while reading online content. By highlighting the words and providing their definitions and pronunciations, it offers a convenient way to learn and remember new vocabulary. With a simple installation process, users can easily integrate this add-on into their Chrome browser and start using it immediately.