Definitions for "Gear effect"
Keywords:  bulge, heel, spin, toe, hit
Tendency of a ball hit on the toe or heel of the club (usually thought of in terms of woods) to spin in the opposite direction from the twisting of the club face.
The spin created by the bulge in a wood when the ball is struck near the toe or heel. If a ball is hit near the toe, the spin is counterclockwise. If the ball is hit near the heel, the spin is clockwise.
The effect that tends to cause a ball hit toward the toe or heel side of face center to curve back to the intended target line.