The triskelion (from Greek, roughly "three-legged") most commonly refers to the triple spiral β three interlocking spiral arms radiating from a shared centre with continuous rotational symmetry, each arm identical to the other two, rotated by exactly 120 degrees. Unlike a symbol with a fixed "top," the triple spiral has no single correct orientation; it reads the same regardless of which way it is turned.
A related but geometrically distinct symbol, sometimes also called a triskelion or more precisely a triskeles, replaces the spiral arms with three bent human legs radiating from a central point β most famously seen on the flags of Sicily and the Isle of Man. The two forms share the same three-fold rotational logic but come from genuinely separate artistic and cultural traditions, a distinction worth keeping clear.