game played with three balls (two white and one red) on a table without pockets, in which the object is to drive one of the white balls (cue ball) into both of the other balls. Each carom thus completed counts one point. In a popular version of the game called three-cushion billiards, the cue ball is played so that it strikes an object ball and three or more cushions (not necessarily different cushions) in any order before striking the second object ball.

The three balls are red, white, and white with a spot. The standard table in carom billiards is 5 by 10 feet (152 by 305 cm), although smaller tables of similar proportions are also used. The table is marked with three spots, one near its head, one at its centre, and one near its foot. To begin play, the first player may select either white ball as cue ball. The red ball is spotted on the foot spot, a white ball on the head spot, and the cue ball within six inches directly to either side of the white object ball. The cue ball must contact the red ball first on the break (first) shot; on subsequent shots either red or white may be the first ball hit. If the first player scores on his opening shot, he may select either white ball as cue ball on his second shot. Subsequently, however, he must cue the white ball used on that second shot and his opponent must cue the other.

When a player fails to score, he yields to his opponent, who plays the balls as they have been left. A game is usually continued until one player scores an agreed number of points, often 50. Shooting the wrong cue ball incurs a penalty of one point and loss of turn. See also billiards.