Derived from the Greek word "Triskeles" meaning "three legs", the Triskele or Triple Spiral is an ancient Celtic symbol. It is referred to as a Triskelion. It gained popularity in its use within the Celtic culture from 500BC on. This symbol is one of the most difficult to decipher as symbolists believe it is reflective of many areas of culture from the time.
First, it can be thought to represent motion as all three arms are positioned to make it appear as if it is moving outwards from its center. Movement, or motion, is believed to signify energies, in particular within this Celtic Symbol the motion of action, cycles, progress, revolution and competition.