Believe it or not, Google might be the best online dictionary available. Give it a try! Type in a word that you have no idea how to spell. In the search results Google will often ask, “Did you mean…” In most cases, that suggested search term is the correct spelling. We searched Google for pthagorean theorum, which is the formula we all remember from Algebra class. Google asked if we meant pythagorean theorem. That’s the one!
The online dictionary below utilizes multiple tools to produce amazing results. Give it a try! As you can see, it searches multiple types of dictionaries and several languages.