A billiard, a type of shot in cue sports.
Billiards: cue sports in general, including pool, carom billiards, snooker, etc.; the term "billiards" by itself is also sometimes used to refer to any of the following more specifically:
Carom billiards (also known as French billiards), games in general (a chiefly non-British usage)
Three-cushion billiards even more specifically, the most popular form of carom billiards worldwide (the most common specific usage)
The specific game of English billiards (a chiefly British, Irish and Australian usage)
Pool (cue sports) (pocket billiards) games, such as eight-ball and nine-ball, in general (a chiefly colloquial North American usage)
See the list of cue sports for various other games with "billiards" in their names; also more
specifically:
Pin billiards (disambiguation)
Bar billiards, a game combining elements of bagatelle and English billiards
Electric billiards, an obsolete term for pinball (from billard électrique in French, in which pinball is today called flipper, a borrowing from English)
Mathematics and physics
Billiard (number), the long-scale name used in most European languages for the number 1015 (called quadrillion in the short scale generally used in English)
Dynamical billiards, the mathematical theory of particle trajectories within a closed reflective boundary
People:
Harry Billiard (1883–1923), Major League Baseball pitcher
Maria Duchêne-Billiard (1884–?), French contralto of the Metropolitan Opera
Cora Billiard Wickham Sibley (née Billiard, 1884–1976), American painter, and wife of Robert Pelton Sibley
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