Pocket billiards
Encyclopedia
Pool, also more formally known as pocket billiards (mostly in North America) or pool billiards (mostly in Europe and Australia), is the family of cue sports and games played on a pool table having six receptacles called pockets along the , into which balls
Billiard ball
A billiard ball is a small, hard ball used in cue sports, such as carom billiards, pool, and snooker. The number, type, diameter, color, and pattern of the balls differ depending upon the specific game being played...

 are deposited as the main goal of play. Popular versions include eight-ball and nine-ball. An obsolete term for pool is six-pocket.

History

The Oxford English dictionary states that pool is generally "any of various types of billiards for two or more players" but goes on to note that the first specific meaning of "a game in which each player uses a cue ball of a distinctive colour to pocket the balls of the other player(s) in a certain order, the winner taking all the stakes submitted at the start of the contest" is now obsolete and its other specific definitions are all for games that originate in the United States of America.

Outside the cue sports industry which has long favored the more formal term, pocket billiards is (in English) more commonly referred to as pool, due to perhaps an association with the poolrooms where gamblers
Gambling
Gambling is the wagering of money or something of material value on an event with an uncertain outcome with the primary intent of winning additional money and/or material goods...

 pooled their money to bet off-track on horse races. Because these venues often provided billiard tables, the term pool eventually became synonymous with billiards.

In the United States, though the original "pool" game
Kelly pool
Kelly pool is a pocket billiards game played on a standard pool table using fifteen numbered markers called peas or pills, and a standard set of sixteen pool balls...

 was played on a pocketless carom billiards table, the term later stuck to pocket billiards as it gained in popularity. As the traditional view of billiards as a refined and noble
Nobility
Nobility is a social class which possesses more acknowledged privileges or eminence than members of most other classes in a society, membership therein typically being hereditary. The privileges associated with nobility may constitute substantial advantages over or relative to non-nobles, or may be...

 pastime did not blend well with the low-class connotations of gambling, the billiards industry began to distance itself from the term pool beginning in the late 19th century.

There are hundreds of pool games. Some of the more well known include eight-ball, nine-ball, ten-ball, straight pool
Straight Pool
Straight pool, also called 14.1 continuous or simply 14.1, is a pocket billiards game, and was the common sport of championship competition until overtaken by faster-playing games like nine-ball...

, and one-pocket.

There are also hybrid games combining aspects of both pool and carom billiards, such as American four-ball billiards, cowboy pool and bottle pool
Bottle pool
Bottle pool, also known as bottle-billiards and bottle pocket billiards, is a hybrid billiards game combining aspects of both carom billiards and pocket billiards...

.

Equipment

Pool uses different equipment from carom billiards. Other than the table having pockets, the billiard balls for pool are generally smaller and range from 2.25 inches (57.15 mm) in diameter to 2.375 inches (60.33 mm) in diameter; by comparison, carom billiard balls are 61–61.5 mm [between approximately and  in]. Under the WPA
World Pool-Billiard Association
The World Pool-Billiard Association is the international governing body for pocket billiards . The group was formed in 1987, and was initially headed by a provisional board of directors consisting of representatives from Japan, the United States, Sweden, and Germany...

/BCA
Billiard Congress of America
Billiard Congress of America is a governing body for cue sports in North America , the regional member organization of the World Pool-Billiard Association...

 (see below) equipment specifications, the weight may be from 5.5 to 6 oz. (156–170 g) with a diameter of 2.25 in. (57.15 mm), plus or minus 0.005 in. (0.127 mm). Modern coin-operated pool tables generally use one of three methods to distinguish and return the cue ball to the front of the table while the numbered balls return to an inaccessible receptacle until paid for again: the cue ball is larger and heavier than the other balls, or denser and heavier, or has a magnetic core. Modern pool tables generally range in size from 3.5 feet (1.07 m) by 7 feet (2.13 m), to 4.5 feet (1.37 m) by 9 feet (2.74 m). Modern cues
Cue stick
A cue stick , is an item of sporting equipment essential to the games of pool, snooker and carom billiards. It is used to strike a ball, usually the...

 are generally 58.5 inches (148.6 cm) long for pool while cues prior to 1980 were designed for straight pool and had an average length of 57.5 inches (146.1 cm). Carom billiards cues are generally shorter with larger tips, and snooker cues longer with smaller tips.

Organisation

As a competitive sport, pool is governed internationally by the World Pool-Billiard Association
World Pool-Billiard Association
The World Pool-Billiard Association is the international governing body for pocket billiards . The group was formed in 1987, and was initially headed by a provisional board of directors consisting of representatives from Japan, the United States, Sweden, and Germany...

 (WPA), which has multi-national, regional affiliates comprising the All Africa Pool Association (AAPA), Asian Pocket Billiard Union (APBU, including the Middle East), Billiard Congress of America
Billiard Congress of America
Billiard Congress of America is a governing body for cue sports in North America , the regional member organization of the World Pool-Billiard Association...

 (BCA, Canada and the US), Confederation Panamerica of Billiards (CPB, Latin America and Caribbean), European Pocket Billiard Federation
European Pocket Billiard Federation
The European Pocket Billard Federation is the European governing body for pocket billiards. EPBF is the European regional affiliate member of the World Pool-Billiard Association .-EPBF members:National affiliate members of EPBF :...

 (EPBF, including Russia and the Near East), and Oceania Pocket Billiard Association (OPBA, Australia, New Zealand, Pacific islands)
The WPA represents pool in the World Confederation of Billiard Sports
World Confederation of Billiard Sports
The World Confederation of Billiard Sports is the international umbrella organization encompassing the major cue sports , including carom billiards, pool games of several varieties, and snooker. The confederation is relatively new, having been founded in 1992...

, which in turn represents all forms of cue sports in the International Olympic Committee
International Olympic Committee
The International Olympic Committee is an international corporation based in Lausanne, Switzerland, created by Pierre de Coubertin on 23 June 1894 with Demetrios Vikelas as its first president...

.

Some of the other cue sports that come under the auspices of the World Confederation of Billiard Sports are The Union Mondiale de Billard
Union Mondiale de Billard
The Union Mondiale de Billard is the world governing body for carom billiard games. The organization was founded in Madrid, Spain on 1 June 1959, and is dedicated to promoting the modern carom billiards games...

 (French for World Union of Billiards) is the world governing body for carom
Carom
Carom may refer to:* Ricochet* Carom billiards* Carom seeds or Ajwain, a spice-See also:* Carrom, a family of tabletop games* Caromb, a commune in Vaucluse, France...

 a pocket less form of billiards, and the World Professional Billiards and Snooker Association
World Professional Billiards and Snooker Association
The World Professional Billiards and Snooker Association, often abbreviated to the WPBSA, founded in 1968 and based in Bristol, England, United Kingdom is the governing body of professional snooker and English billiards...

 (professional) and International Billiards and Snooker Federation
International Billiards and Snooker Federation
The International Billiards & Snooker Federation is the organisation that governs non-professional snooker and English billiards around the world . The organization is presently headquartered in Reims, France.-History:...

 (amateur) the world governing bodies for snooker
Snooker
Snooker is a cue sport that is played on a green baize-covered table with pockets in each of the four corners and in the middle of each of the long side cushions. A regular table is . It is played using a cue and snooker balls: one white , 15 worth one point each, and six balls of different :...

 and billiards (English)
English Billiards
English billiards, called simply billiards in many former British colonies and in Great Britain where it originated, is a hybrid form of carom and pocket billiards played on a billiard table. Billiards is less well known as "the English game", "the all-in game" and "the common game".The game is for...

other cue sports played on a table with pockets.
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