Try out popIn here
Try looking up the word "hat-trick" in Google search:
...A hat-trick in sports is associated with succeeding at anything three times in...STEP1 Highlight the word "hat-trick".
STEP2 Point the cursor at the round icon that appears and click on "Google Search" from the menu.
Try looking up a news term such as "Open Government" from a news article in Wikipedia:
...The White House has launched several new Web sites as part of its "Open Government Initiative." The Obama administration calls it...STEP1 Highlight the word or phrase you want to look up.
STEP2 Point the cursor at the round icon that appears, then in the menu scroll down and click on "Wikipdeia."
* You must download the popIn plug-in if you want to use it on other pages.