At this website, the American Ballet Theatre offers an interactive ballet dictionary. When you get to the site look at the list of ballet words and terms on the left side of the screen. They are in alphabetical order. Click on any one and a new page opens with a definition of the term in text along with highlighted links to more information. On most of the pages you will also see a logo or a smaller screen. Click on it to watch a film clip of someone from American Ballet Theatre performing the move!
It seems to me this would be an especially helpful tool for anyone studying ballet. For those who don’t, just understanding what the terminology means — and being able to see it demonstrated — may enhance appreciation for ballet.