Leg - Vine's Expository Dictionary of New Testament Words

Leg

[ 1,,G4628, skelos ]
the leg from the hip downwards," is used only of the breaking of the "legs" of the crucified malefactors, to hasten their death, John 19:31-John 19:33 (a customary act, not carried out in the case of Christ, in fullfillment of Exodus 12:46; Numbers 9:12). The practice was known as skelokopia (from kopto, "to stike"), or, in Latin, crurifragium (from crus, "a leg," and frango, "to break").

Vine's Expository Dictionary of New Testament Words