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bow 
Weapon with a wooden or metal shaft that bends when the bowstring is stretched to fire arrows.
upper limb
Limb: the flexible part that stores potential energy when the bow is bent.
bowstring
Fibers secured to the bow that are stretched to fire an arrow.
lower limb
Limb: the flexible part that stores potential energy when the bow is bent.
nock
Notch in the end of the limbs to take the bowstring knot.
handle
Part between the two limbs; it is used to grip the bow.
back
Part of the bow opposite the bowstring.
arrow
Projectile fired by a bow or a crossbow; it consists of a shank, a point and a heel with a notch and fletching.
modern bow
Bow with pulleys, which increase the power of the shot.
