A ball that is rolled toward the outside of the lane and then curves back toward the center of the lane.

Curve is the variation from a straight line in the horizontal plane measured after the part has been roll formed. Causes of curve included incorrect horizontal roll alignment and uneven forming pressure. See bow, camber, sweep, and twist.

a part of the arc of a circle

Ball that rolls down the lane in a wide-sweeping arc. Differs from a hook, which has a sharper break into the pocket.

A ball that has a big, slow break. Compare to hook.