Definition: Google Similar Images is a Google Labs variation of the standard Google Image Search. Rather than simply using keyword text, you can search for images that are similar to the image you've already found. You can still search Similar Images using text, so this is really an experimental feature enhancement for Google Image Search.
Similar Images is on the Web at similar-images.googlelabs.com, but like all Google Labs products, it could vanish or "graduate" at any moment.
