Google integrated a contextual based menu that lets you translate, define and search a selected word for eBooks, available from the Google eBookstore.
Derek Lie, Software Engineer at Google states,
When bookworms stumble across a word we don’t know, we face the classic dilemma of whether to put the book down to look up the word or forge ahead in ignorance to avoid interrupting the reading experience. Well, fret no more, readers, because today you can select words in Google eBooks and look up their definitions, translate them or search for them elsewhere in the book from within the Google eBooks Web Readerâ€”without losing your page or even looking away.
By adding these features, Google certainly has made reading ebooks easier than ever before.
Here’s how you can use these features. Double-click or highlight the word that you want to look up and a pop-up menu appears with the following option: Define, Translate, Search Book, Search Google and Search Wikipedia.
By clicking Define, the pop-up now displays a definition of the word via Google Dictionary.
You can translate a single word or several sentences to any of the languages Google offers.
You can also search for the selected text within the ebook itself or across the web.