[feature request] Look up words
I often use Evince for reading academic papers. It would be helpful to be able to define words while reading in the document. What I am envisioning is when a user selects some text, they can select a popup menu action called "define" or something similar. Once selected, some sort of definition pops up. A few options for actually providing the definition include opening gnome-dictionary with the selected word, opening a browser to search the word, or some pop-up window managed by evince. It seems like other PDF viewers have tools for looking up words. Adobe, for example, opens a browser open to the word on dictionary.com.
Would a feature like this be useful for Evince? I am willing to help develop the feature. Thanks