The form of billiards known as ROTATION is an eight-letter word. It is a game of pocket billiards, also known as pool, in which the object is to score points by pocketing balls in various combinations. The game is played on a standard pool table with fifteen numbered balls and a cue ball. The player must use the cue ball to pocket the other balls in a specific order, and the player who pockets all the balls first wins the game.