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Not to be confused with Billard.

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)
    • 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 (pocket billiards) games, such as eight-ball and nine-ball, in general (a chiefly colloquial North American usage)
  • Electric billiards, an obsolete term for pinball (from billard électrique in French, in which pinball is today called flipper, a borrowing from English)


  • Billiard, the long-scale name used in most European languages (chiefly French, Spanish, German and Dutch) for the number 1015 in mathematics (called "quadrillion" in the short scale generally used in English).


  • 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.


See also[edit]