Any thing that is three legged is a tripod. That is why most camera holders are called 'tripod' because they have three legs to support the camera to get nice clean pictures. Sometimes we mistakenly use the word tripod for other things, like the string tripod is really not an tripod, because there is only one string used as a 'leg', so it should be probably called 'monopod sting'!

Check out some of those great DIY tripod Instructables!