There is a new encyclopedia (or "wiki") of welding and gases terms online sponsored by the Gases and Welding Distributors Association (GAWDA). It's called GAWDAwiki GAWDAwiki.
The wiki is interactive, which means you can use it as a reference, add new terms and definitions, or add more information to existing terms. Please take a look at it and see what you think. It's a great tool for beginners and pros!