Definitions for "Limbs"
Keywords:  bow, arrow, riser, flexes, motivation
This is the ends of the bow from the riser out. This is the part that flexes to give the arrow it's forward motion.
The flexible part of a bow above and below the handle that stores energy when the bow is drawn and released into the arrow when loosed.
The upper and lower part of a bow that moves. This is the part that determine the force of the bow.
Keywords:  syncline, anticline, dip, axis, fold
rock layers on either side of the axis of a fold. Rock layers in any limb all dip in the same direction, either away from the axis of an anticline or toward the axis of a syncline.