Stop-motion animation is used to describe animation created by
physically manipulating real-world objects and photographing them one
frame of film at a time to create the illusion of movement. There are
many different types of stop-motion animation, usually named after the
medium used to create the animation. Computer software is widely
available to create this type of animation.
http://en.wikipedia.org/wiki/Animation
http://en.wikipedia.org/wiki/Animation