Definition of Clock

A break shot in which the rack (pack) is disturbed as little as possible within the bounds of a legal shot, in order to force the opponent to have to break it up further. A soft break is desirable in some games, such as straight pool, in which breaking is a disadvantage; and forbidden by the open break rules of other games such as nine-ball and eight-ball.

In snooker, a situation during a frame in which the first line of the remaining reds grouped together, where the original pack was, are in a straight horizontal line. This has implications when opening the pack, as a full-ball contact off the top cushion will usually cause the cue-ball to stick to the red and fail to develop a potting opportunity.

Either to hit the balls hard with no intention in mind other than to get lucky (or 'hit-and-hope'), or to shoot hard at the money ball ball with the same intention. Compare slop and fluke.

Chiefly American, and largely obsolete: Same as referee.

Cut Throat is a game of pocket billiards created to support three or five players. Balls are assigned to each player, and the purpose is to sink all the opponent's balls first to eliminate the other players.

CPA is the acronym for the Canadian Poolplayers Association. The CPA is the Canadian league of the APA (The American Poolplayers Association)

In snooker, the colour ball worth 5 points, whose spot is at the center of the table.

This is a relatively simple machine that is used to duplicate inlay cuts within a cue so that the sizing will be accurate. When compared to the technical CNC machines, this is more like a tape measure, but when this effective tool is used to inlay a cue stick, you are getting a cue with genuine handcrafted inlays.

A player's (or doubles team's) turn at the table, usually ending with a failure to score a point or to pocket a ball, depending on the game, a foul, a safety or with a win. In some games, such as five-pins and killer, a player's inning is always limited to one shot, regardless of the intent and result of the shot. Usually synonymous with visit, except in scotch doubles format. The term is sometimes used to mean both players'/teams' visits combined, e.g. when referring to which inning in which a memorable shot occurred.

In snooker and other British usages, a break of 50-99 points (100 points or more being called a century), which involves potting at least 12 consecutive balls (i.e. the last 3 reds with at least 2 blacks and a pink, followed by all the colours).

Chiefly British. This is a shot in a snooker game where the first object ball hit contacts another object ball and the second one is pocketed. If both of the balls are red, or if the second ball would be on if the first ball had not been deemed free then it is an allowed shot.

Side spin on a cue ball on the opposite side of the direction of the cut angle to be played (right-hand english when cutting an object ball to the left, and vice versa). In addition to affecting cue ball position, outside english can be used to decrease throw.

Any shot where the cue ball stops immediately after hitting an object ball. Generally requires a full hit.

This is the stick used to contact the cue ball in pool and billiards games. The cue stick is usually made of wood, features a special contact tip, and is usually tapered to slide through your hand. The price of these tools can range from oil change to transmission change depending on the quality of craftsmanship and design.

All-Africa Pool Association. The AAPA is a member of the WPA.

A slang term for a cue, usually used with "piece", as in "that's a nice piece of wood".

This is a slang term created by Freddy Bentivegna to refer to a cluster of balls on your side of the table that do not lend to easy pocketing in a game of one pocket.

The International Pool Tour is a professional sports tour created in 2005 by Kevin Trudeau and hosted by Rebecca Grant. It aims to elevate pool (pocket billiards) to the level of other modern sports.

A tight, Spandex glove covering usually most or all of the thumb, index finger and middle finger, worn on the bridge hand as a more convenient and less messy alternative to using hand talc, and for the same purpose: a smooth-gliding stroke.

A situation where the cue ball is directly in front of another ball in the line of the shot such that the player is hampered by it, having to bridge over it awkwardly with the likelihood of a foul looming if the object ball is inadvertently touched.

This is to watch a match with such intensity that there is worry, usually because of a wager on the game.

When the object balls in straight rail pool are lined up close to each other, but extending out from the cushion, and you choose to bounce off the first object ball at the cushion and then come back to graze the second object ball. This technique can be used to continue scoring points as long as you are efficient with the shot.

The ball meant to be struck and sunk in your called shot.

The act of setting up the balls for a break shot. In tournament play this will be done by the referee, but in lower-level play, players either rack for themselves or for each other depending on convention.