Source : Webster's Revised Unabridged Dictionary (1913)

Triskelion \Tris*kel"i*on\, or Triskele \Tris"kele\, n. [Gr. ?
   three-legged. See {Tri-}; {Isosceles}.]
   A figure composed of three branches, usually curved,
   radiating from a center, as the figure composed of three
   human legs, with bent knees, which has long been used as a
   badge or symbol of Sicily and of the Isle of Man.

Source : WordNet®

triskelion
     n : a figure consisting of three stylized human arms or legs (or
         three bent lines) radiating from a center [syn: {triskele}]
     [also: {triskelia} (pl)]