Pool Tables
Pocket billiards, most commonly referred to as pool, is the general term for a family of games played on a specific class of billiards table, having 6 receptacles called pockets (or "holes") along the rails, in which balls are deposited as the main goal of play. Cue sports that are played on pocketless tables are generally referred to as carom billiards.
Outside the cue sports industry, pocket billiards is almost exclusively referred to as "pool," due to a perhaps unfortunate association with the "poolrooms" where gamblers "pooled" their money to bet remotely ("off-track") on horse races. Because these venues often provided billiard tables, the term "pool" became synonymous with billiards, and though the original "pool" game was played on a pocketless table, the name stuck to pocket billiards as it gained in popularity. Though the traditional view of billiards as a refined and noble pastime did not blend well with the low-class connotations of gambling, the billiards industry's attempts to distance itself from the term "pool" beginning in the late 19th century were largely unsuccessful.