A symbol in the form of three bent or curved lines or limbs radiating from a common center.

It is sometimes a representation of three human limbs.

A triskelion is the symbol of Sicily, where it is called Trisceli, and the Isle of Man, and a symbol of Brittany; the Sicilian and Manx triskelions feature three running legs, bent at the knee, and conjoined at the crotch (a non-medical term in common usage for the region where the legs come together, the place where the lower limbs divide).

The word crotch is thought to be related to the word "crutch" since the first crutches were most likely fashioned from the crotch of a tree, the place where its limbs divide.