Billiard

Billiard or billiards may refer to:

• A billiard, a type of shot in cue sports (see below)
• 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, in the North America, the British Commonwealth, etc.)
• The specific game of English billiards (a chiefly British and Commonwealth English usage)
• Pool (pocket billiards) games (such as eight-ball and nine-ball) in general (a chiefly colloquial North American usage)

• Billiard, the (chiefly French) long-scale name for the number 10¹⁵ in mathematics (called "quadrillion" in short scale)

• Dynamical billiards, the mathematical theory of particle trajectories within a closed reflective boundary, in theoretical physics (contrast this mass noun with the count noun "dynamical billiard", below)

• A dynamical billiard, any of several systems of particle trajectories within a closed reflective boundary

• Nicolas billiards, an obscure French board game invented in 1895, and of no relation to the games above (see its French article for an illustration)
• Indian (or Nepalese) finger billiards, the board game better known as carrom.
• Electric billiards, an obscure term for pinball (from the French billard électrique, who today call pinball flipper, a borrowing from English)

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