Memidex is releasing a free online dictionary and thesaurus today. It’s being called “the Internet’s first combined index of external definitions, audio, and etymology”, and it has over 12 million detailed references found from respected sources online.

This isn’t just a dictionary. Memidex didn’t just gather definitions; it also went and found other sources of images, descriptions, and sounds and indexed those sources. Memidex then built a search engine to dig through all this content and help you find what you’re looking for.

If you look up a word, the definitions might come from any of a dozen online sources, and you can also see what several different sites saw about the etymology of a word. If you’d like to hear it pronounced, you will have sound clips drawn from as many as 7 different websites.

via Memidex