Balance hole: A hole drilled into a bowling ball into which a finger is not inserted.Named after 1950s American Bowling Congress officer Frank K. Baker format: A team game scoring format in which a team's members bowl frames in a repetitive order to complete a single game (example: bowler A bowls frames 1 and 6, bowler B bowls frames 2 and 7, and so forth)._#_-Bagger: A string of _#_ strikes in consecutive frames within the same game (example: "six-bagger").Backswing: The portion of a delivery following the push-off (push away) and preceding the forward swing and release.Back end: The (approx.) one-third of the lane furthest from the foul line, which generally lacks oil.Īn advanced bowler with a high backswing.Back-up ball: A ball thrown with a right-handed release that hooks left to right, or thrown with a left-handed release that hooks right to left.
For example, a player rolling strikes in the seventh, eighth and ninth frames plus three more in the tenth frame is said to have the "back six".
Axis tilt: Angle of the ball's axis of rotation in a vertical plane, measured with respect to the horizontal.Axis rotation is also referred to as side rotation or side roll. Initial axis rotation is defined at the time of release. Generally, axis rotation is imparted by turning the ball, and significantly contributes to hook. Axis rotation: Angle of the ball's axis of rotation in a horizontal plane, measured with respect to a line parallel to the foul line.Average: The total of scores from multiple games divided by the number of games, rounded down to an integer (whole-number) value.Adjective is also applied to the ball's core.
Angle of entry: The angle at which the ball is moving when first impacting a pin (especially the pocket), measured with respect to a line parallel to the lane's boards.Andy Varipapa 300: 12 consecutive strikes bowled across two games.Anchor: In league play, the person bowling last: usually the bowler with the highest average or the best performer under pressure.Alignment is usually expressed in terms of board number and arrow number, for example, "standing at (board) 25, sliding at 20, looking at the second arrow". Align(ment): A choice of location of the feet during setup, location of the sliding foot at time of release, and choice of target (arrow), which collectively determine initial ball trajectory.Adjust(ment): A change in technique-especially in alignment, but also in approach, delivery, targeting or ball choice-often made in response to changing lane conditions or to correct undesirable ball motion.Action bowling: Bowling contests involving money betting, historically associated with the New York underworld from the 1940s to the 1970s.Abralon (pad): An abrasion technology product used to "sand" ball coverstocks with different grits (degrees of roughness) to control the amount of friction between the coverstock and lane.ABC: American Bowling Congress, the first enduring standards and rules governing organization for ten-pin bowling in the United States, formed in September 1895 and merged in 2005 with other organizations to form the United States Bowling Congress ( USBC).Black lines on balls simulate ring-shaped oil tracks (initial contact with lane).
Three angles of axis tilt (blue axes) relative to the horizontal.