Pool, also more formally known as pocket billiards or pool billiards
Pool, also more formally known as pocket billiards or pool billiards, is the family of cue sports and games played on a pool table having six receptacles called pockets along the rails, into which balls are deposited as the main goal of play. Popular versions include eight-ball and nine-ball. An obsolete term for pool is six-pocket.
There are hundreds of pool games. Some of the more well known include eight-ball, nine-ball, ten-ball, straight pool, one-pocket and bank pool.
There are also hybrid games combining aspects of both pool and carom billiards, such as American four-ball billiards, cowboy pool and bottle pool.