Definition of 9 ball

Nine Ball is a rotation game so a player must hit the lowest numbered ball first.
The object of the game is pocket the 9-ball on any legal shot.

24 Random Essential Billiards Terms

Sometimes interchangeable with scratch, though the latter is often used only to refer to the foul of pocketing the cue ball. A violation of a particular game's rules for which a set penalty is imposed.
On a shot, the extension of the cue stick through the cue ball position during the end of a player's stroke in the direction originally aimed.
Side spin on the cue ball that causes it to unnaturally roll off a cushion (contacted at an angle) against rather than with the ball's momentum and direction of travel. If angling into a cushion that is on the right, then reverse english would be right english, and vice versa. The angle of deflection will be steeper (narrower) than if no english were applied. The opposite of running english, which has effects other than simply the opposites of those of reverse english.
Pronounced "No-Rango". A norengo refers to what should be an easy straight in shot where the object ball is usually very close to the pocket. But the shooter strikes the ball harder than they should and the result is the object ball rattling out of the pocket and a missed shot.
Also see Lorengo.
This is the apex ball in the triangle, racked on the foot spot in a normal game.
The triangular device, generally plastic, used to group the balls in a pyramid form prior to the beginning of a game.
Jargon for a tournament chart, showing which players are playing against whom and what the results are. Often shortened to card.
An unintentional and often barely perceptible curve imparted to the path of the cue ball from the use of english without a level cue. Not to be confused with a swerve shot.
All-Africa Pool Association. The AAPA is a member of the WPA.
On two piece cues, the area of the cue between the joint and the wrap.
Any game which uses a rack composed of less than 15 balls.
A player who was not shooting well during a match but suddenly turns it around and starts playing better and more accurately. Also known as "Finding a stroke" or "Found their stroke".
The pocket chosen to house the selected ball in your called shot.
This is how the player is who is does not break before they get a chance to get out of the break. This time period is when the breaking player with a position advantage on the table.
This is a term used to refer to all the different aspects involved in setting up a shot, i.e. the stance, grip, bridge, and stoke.
In snooker, the highest-value colour ball on the table, being worth seven points. In some (especially American) snooker ball sets it is numbered "7" on its surface.
The black ball (usually numbered "8") in the eight-ball variant game blackball (and its variants); also the common British term for the slightly larger but otherwise identical 8 ball in a kelly pool set (a.k.a. American or WPA pool set).
Any shot where the cue ball stops immediately after hitting an object ball. Generally requires a full hit.
A predetermined, fixed number of games players must win to win a match; "a race to seven" means whomever wins seven games first wins the match.
In snooker, a pot into any of the corner pockets where the cue ball had started in the opposite lengthwise half of the table. In other words, a pot in which the cue ball or object ball crosses an imaginary line joining the middle pockets.
In pool, the degree to which racked balls move apart upon impact by the cue ball as a result of a break shot.
In snooker, a shot sending the cue ball into the pack of red balls and separating them (after potting the ball-on). At least one split is usually necessary in each frame, since the original triangle of reds does not allow any balls to be potted reliably.
Asian Pocket Billiard Union. The APBU is a member of the WPA.
Also pills, tally balls and shake balls. Small, round markers typically numbered 1 through 15 or 16, which are placed in a bottle for various random assignment purposes, such as in a tournament roster, to assign order of play in a multiplayer game, or to assign particular balls to players in games such as kelly pool.
When the cue ball contacts three or more cushions in carom games.
Slang term for the cue ball.