When I select and right-click a word in a PDF file in Reader, it pops-up a menu with a Look Up Word option. Upon clicking it, I am taken to dictionary.com website. I want to change this to OED, because I have an account with them. Moreover, I often study old texts with words that are not mentioned on the default site. I have searched high and low, but couldn't find a solution. There must be a way to change it to some other on-line service or off-line program.
P.S: If there is no way to do it, I strongly propose Adobe to include this feature in future updates/releases. Trust me, there are thousands out there who absolutely need it.