Billiard table in the context of "Glossary of cue sports terms"

Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression.

The foliation in slate, called "slaty cleavage", is caused by strong compression in which fine-grained clay forms flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation with a specialized tool in the quarry, many slates display a property called fissility, forming smooth, flat sheets of stone which have long been used for roofing, floor tiles, and billiard tables. Slate is frequently grey in color, especially when seen en masse covering roofs. However, slate occurs in a variety of colors even from a single locality; for example, slate from North Wales can be found in many shades of grey, from pale to dark, and may also be purple, green, or cyan. Slate is not to be confused with shale, from which it may be formed, or schist.

Pool is a series of cue sports played on a billiard table. The table has six pockets along the rails, into which balls are shot. Of the many different pool games, the most popular include: eight-ball, blackball, nine-ball, ten-ball, seven-ball, straight pool, one-pocket, and bank pool. Eight-ball is the most frequently played discipline of pool, and it is often thought of as synonymous with "pool".

The generic term pocket billiards is sometimes also used, and favored by some pool-industry bodies, but is technically a broader classification, including games such as snooker, Russian pyramid, and kaisa, which are not referred to as pool games. There are also hybrid games combining aspects of both pool and carom billiards, such as American four-ball billiards, bottle pool, cowboy pool, and English billiards.

Carom billiards, also called French billiards and sometimes carambole billiards, is the overarching title of a family of cue sports generally played on cloth-covered, pocketless billiard tables. In its simplest form, the object of the game is to score points or "counts" by caroming one's own cue ball off both the opponent's cue ball and the object ball on a single shot. The invention as well as the exact date of origin of carom billiards is somewhat obscure but is thought to be traceable to 18th-century France.

There is a large array of carom billiards disciplines. Some of the more prevalent today and historically are (chronologically by apparent date of development): straight rail, one-cushion, balkline, three-cushion and artistic billiards.

Russian pyramid, also known as Russian billiards (Russian: ру́сский билья́рд, russky bilyard), is a form of billiards played on a large billiard table with narrow pockets. It is played across Russia and several former Soviet/Eastern Bloc countries. In the West, the game is known as pyramid billiards, or simply pyramid.

Snooker (pronounced UK: /ˈsnuːkər/ SNOO-kər, US: /ˈsnʊkər/ SNUUK-ər) is a cue sport played on a rectangular billiards table covered with a green cloth called baize, with six pockets: one at each corner and one in the middle of each long side. First played by British Army officers stationed in India in the second half of the 19th century, the game is played with 22 balls, comprising a white cue ball, 15 red balls and six other balls—a yellow, green, brown, blue, pink and black—collectively called 'the colours'. Using a snooker cue, the individual players or teams take turns to strike the cue ball to pot other balls in a predefined sequence, accumulating points for each successful pot and for each foul committed by the opposing player or team. An individual frame of snooker is won by the player who has scored the most points, and a snooker match ends when a player wins a predetermined number of frames.

In 1875, army officer Neville Chamberlain, stationed in India, devised a set of rules that combined black pool and pyramids. The word snooker was a well-established derogatory term used to describe inexperienced or first-year military personnel. In the early 20th century, snooker was predominantly played in the United Kingdom, where it was considered a "gentleman's sport" until the early 1960s before growing in popularity as a national pastime and eventually spreading overseas. The standard rules of the game were first established in 1919 when the Billiards Association and Control Club was formed. As a professional sport, snooker is now governed by the World Professional Billiards and Snooker Association.

Eight-ball (also spelled 8-ball or eightball, and sometimes called solids and stripes, spots and stripes, bigs and smalls, big ones and little ones, or rarely highs and lows) is a discipline of pool played on a billiard table with six pockets, cue sticks, and sixteen billiard balls (a cue ball and fifteen object balls). The object balls include seven solid-colored balls numbered 1 through 7, seven striped balls numbered 9 through 15, and the black 8 ball. After the balls are scattered with a break shot, a player is assigned either the group of solid or striped balls once they have legally pocketed a ball from that group. The object of the game is to legally pocket the 8-ball in a "called" pocket, which can only be done after all of the balls from a player's assigned group have been cleared from the table.

The game is the most frequently played discipline of pool, and is often thought of as synonymous with "pool". The game has numerous variations, mostly regional. It is the second most played professional pool game, after nine-ball, and for the last several decades ahead of straight pool.

The English-originating version of eight-ball pool, also known as English pool, English eight-ball, blackball, or simply reds and yellows, is a pool game played with sixteen balls (a cue ball and fifteen usually unnumbered object balls) on a small pool table with six pockets. It originated in the United Kingdom and is played in the Commonwealth countries such as Australia and South Africa. In the UK and Ireland it is usually called simply "pool".

The English version of eight-ball has two main sets of playing rules used in professional play; those of the World Pool-Billiard Association (WPA), known as "blackball rules", and the code of the World Eightball Pool Federation (WEPF), known as "international rules".

Nine-ball (sometimes written 9-ball) is a discipline of the cue sport pool. The game's origins are traceable to the 1920s in the United States. It is played on a rectangular billiard table with pockets at each of the four corners and in the middle of each long side. Using a cue stick, players must strike the white cue ball to pocket nine colored billiard balls, hitting them in ascending numerical order. An individual game (or rack) is won by the player pocketing the 9 ball. Matches are usually played as a race to a set number of racks, with the player who reaches the set number winning the match.

The game is currently governed by the World Pool-Billiard Association (WPA), with multiple regional tours. The most prestigious nine-ball tournaments are the WPA World Nine-ball Championship and the U.S. Open Nine-ball Championships. Notable 9-Ball players in the game include Luther Lassiter, Buddy Hall, Efren Reyes, Fedor Gorst, Earl Strickland and Shane Van Boening. The game is often associated with hustling and gambling, with tournaments often having a "buy-in" amount to become a participant. The sport has featured in popular culture, notably in the 1961 film The Hustler and its 1986 sequel The Color of Money.